Standardization of ayurvedic medicines – 1: single plant drugs, part 1 – gas chromatographic profiles as an approach to fingerprint standards for oil-bearing drugs - Divakaran, R; Philip, M P; Lakshmanan, A J; Sadanandan, K; Murugesan, M; Somanathan, A R; Bayamma, K V; Damodaran, N P (Indian Drugs, 1985)