Mann, T S and G D, Kiran Babu and Guleria, S and Singh , Bikram (2011) Production of Eucalyptus cinerea Essential Oils Produced by hydrodistillation and supercritical carbon dioxide extraction techniques:A comparative study. Natural Product Communications, 6 (1). pp. 107-110.

Saini, R and Guleria, S and Kaul , V K and Lal, Brij and G D, Kiran Babu and Singh , Bikram (2010) Comparison of the Volatile Constituents of Elsholtzia fruiticosa Extracted by Hydrodistillation, Supercritical Fluid Extraction and head space analysis. Natural Product Communication, 5 (4). pp. 641-644.

Guleria, S and Jaitak, V and Saini, R and Kaul , V K and Lal, Brij and G D, Kiran Babu and Singh , Bikram and Singh, R D (2011) Comparative studies of volatile oil composition of Rhododendron anthopogon by hydrodistillation, supercritical carbon dioxide extraction and head space analysis. Natural Product Research, 25 (13). pp. 1271-1277.