1. PART-I, Vol – V, 76–77;API,2006
2. The cultivation of opium poppy in India;Asthana;Bull. Narc.,1954
3. Characterization of unsaponifiable matter in F8 genotype of opium poppy (Papaver somniferum), Indian J;Banerji;Agric. Sci.,1999
4. On the Races of the Opium Poppy Growing in Semireche and the Origin of their Culture (translated from Russian);Bazilevskays,1976