Singh , N and Mahmood, U and Kaul, V K and Gupta , A P (2006) A new alkylated benzoquinone from rhizomes of Iris kumaonensis. Natural Product Research, 20 (1). pp. 75-78.

Singh , N and Gupta , A P and Singh , Bikram and Kaul , V K (2006) Quantification of Valerenic Acid in Valeriana jatamansi and Valeriana officinalis by HPTLC. CHROMATOGRAPHIA, 63. pp. 209-213.

Bhandari, P and Kumar, Neeraj and Singh , Bikram and Gupta, A P and Kaul, V K (2006) Micro-LC Determination of Swertiamarin in Swertia species and Bacoside-A in Bacopa monnieri. Chromatographia, 64 (9-10). pp. 599-602. ISSN 0009-5893

Bhandari, P and Singh , Bikram and Gupta , A P and Kaul , V K (2006) HPTLC Determination of Swertiamarin and Amarogentin in Swertia Species from the Western Himalayas. JPC-Journal of Planar Chromatography-Modern TLC , 19 (109). pp. 212-215. ISSN 0933-4173

Pati, P K and Sharma, Madhu and Sharma, M and Salar, R K and Sharma, A and Gupta, A P and Singh, B (2008) Studies on leaf spot disease of Withania somnifera and its impact on secondary metabolites. Indian Journal of Microbiology, 48 (4). pp. 432-437. ISSN 0046-8991

Mishra, Nidhi and Acharya , Ruchi and Singh , Bikram and Gupta , A P and Kaul , V K and Ahuja, Paramvir Singh (2005) A simple microanalytical technique for determination of podophyllotoxin in Podophyllum hexandrum roots by quantitative RP–HPLC and RP–HPTLC. Current Science, 88 (9). pp. 1372-1373.

Kumar, Neeraj and Bhandari, P and Singh , Bikram and Gupta , A P and Kaul , V K (2008) Reversed phase-HPLC for rapid determination of polyphenols in flowers of rose species. Journal of Separation Science, 31 (2). pp. 262-267. ISSN 1615-9306

Kumar, Neeraj and Singh , Bikram and Gupta , A P and Kaul , V K (2006) Lonijaposides, novel cerebrosides from Lonicera japonica. Tetrahedron, 62 (18). pp. 4317-4322. ISSN 0040-4020

Singh , Bikram and Kumar, Neeraj and Gupta , A P and Bhandari, P and Uniyal, S K and Kaul , V K (2005) Biflavonoids from Lonicera japonica. Phytochemistry, 66 (23). pp. 2740-2744.

Bhandari, P and Singh , Bikram and Gupta , A P and Kaul , V K (2005) Simultaneous densitometric determination of artemisinin, artemisinic acid and arteannuin-B in Artemisia annua using reversed-phase thin layer chromatography. Journal of Separation Science, 28. pp. 2288-2292.

Bhandari, P and Kumar, Neeraj and Singh , Bikram and Gupta , A P and Kaul , V K and Ahuja, Paramvir Singh (2009) Stability-Indicating LC-PDA Method for Determination of Picrosides in Hepatoprotective Indian Herbal Preparations of Picrorhiza kurroa. Chromatographia, 69 (3-4). pp. 221-227. ISSN 0009-5893

Mishra, Nidhi and Gupta , A P and Singh , Bikram and Kaul , V K and Ahuja, Paramvir Singh (2005) A rapid determination of podophyllotoxin in podophyllum hexandrum by reverse phase high performance thin layer chromatography. Journal of Liquid Chromatography & Related Technologies, 28 (5). pp. 677-691. ISSN 1082-6076

Jaitak, V and Gupta , A P and Kaul , V K and Ahuja, Paramvir Singh (2008) Validated high-performance thin-layer chromatography method for steviol glycosides in Stevia rebaudiana. Journal of Pharmaceutical and Biomedical Analysis, 47. pp. 790-794.

Singh, N P and Gupta , A P and Sinha, Arun K and Ahuja, Paramvir Singh (2005) High-performance thin layer chromatography method for quantitative determination of four major anthraquinone derivatives in Rheum emodi. Journal of Chromatography, 1077 (2). pp. 202-206. ISSN 0021-9673

Pathania, V and Gupta , A P and Singh , Bikram (2006) Improved HPTLC Method for Determination of Curcuminoids from Curcuma longa. Journal of Liquid Chromatography & Related Technologies, 29. pp. 875-885. ISSN 1082-6076

Singh, N and Singh , Bikram and Gupta , A P and Kaul , V K (2005) Quantification of Picroside-I and Picroside-II in picrorhiza kurroa by HPTLC. Journal of Chromatography and Related Technologies, 28 (11). pp. 1679-1691. ISSN 1082-6076

Singh , Bikram and Singh, N and Gupta , A P and Kaul, V K (2006) Quantification of Valerenic Acid in Valeriana jatamansi and Valeriana officinalis by HPTLC. Chromatographia, 63. pp. 209-213.

Sharma, U K and Sharma, N and Gupta , A P and Kumar, Vinod and Sinha, Arun K (2007) RP-HPTLC densitometric determination and validation of vanillin and related phenolic compounds in accelerated solvent extract of Vanilla planifolia*. Journal of Separation Science , 30. pp. 3174-3180.

Sharma, N and Sharma, U K and Gupta , A P and -------, Devla and Sinha, Arun K and Lal, Brij and Ahuja, Paramvir Singh (2009) Simultaneous densitometric determination of shikonin, acetylshikonin, and b-acetoxyisovalerylshikonin in ultrasonic-assisted extracts of four Arnebia species using reversed-phase thin layer chromatography. Journal of Separation Science, 32. pp. 3239-3245.

Swaroop, A and Gupta , A P and Sinha, Arun K (2005) Simultaneous determination of quercetin, rutin and coumaric acid in flowers of Rhododendron arboreum by HPTLC. Chromatographia, 62 (11-12). pp. 649-652. ISSN 0009-5893

Sharma, V and Gupta , A P and Bhandari, P and Gupta , R C and Singh , Bikram (2007) A Validated and Densitometric HPTLC Method for the Quantification of Withaferin-A and Withanolide-A in Different Plant Parts of Two Morphotypes of Withania somnifera. Chromatographia, 66. pp. 801-814.

Bhandari, P and Kumar, Neeraj and Singh , Bikram and Gupta , A P and Kaul, V K (2007) A rapid RP-HPTLC densitometry method for simultaneous determination of major flavonoids in important medicinal plants. Journal of Separation Science, 30 (13). pp. 2092-2096. ISSN 1615-9306