VED PRAKASH, NARENDRA KUMAR, RANJAN BHATTACHARIYYA, M. KUMAR, and A.K. SRIVASTVA, “Productivity, economics, energetics and soil properties of vegetables-based relay intercropping systems”, IJA, vol. 52, no. 4, pp. 300–304, Oct. 2001, doi: 10.59797/ija.v52i4.4943.