V. S. KANDALKAR, K. B. NIGAM, G. N. PANDEY, H. PATIDAR, and R. C. MISHRA, “GENETIC ANALYSIS OF RESISTANCE TO DOWNY MILDEW [PERONOSPORA ARBORESCENS (BERK) DE-BARYl IN OPIUM POppy (PAPAVER SOMNIFERUML.)”, IJGPB, vol. 53, no. 02, pp. 174–177, May 1993.