Muthuraj, M. “Substitution and Complementarity Between Energy Inputs in Cotton Cultivation in Tamil Nadu”. Arthshastra Indian Journal of Economics & Research 1, no. 1-2 (June 1, 2012): 4–12. Accessed February 2, 2026. https://www.indianjournalofeconomicsandresearch.com/index.php/aijer/article/view/54504.