SANJAY K. DWIVEDI and G.K. SHRIVASTAVA, “Planting geometry and weed management for maize (Zea mays)-blackgram (Vigna mungo) intercropping system under rainfed vertisols”, IJA, vol. 56, no. 3, pp. 202–208, Oct. 2001, doi: 10.59797/ija.v56i3.4695.