AHMAD, S., and M. HASANUZZAMAN. “Integrated Effect of Plant Density, N Rates and Irrigation Regimes on the Biomass Production, N Content, PAR Use Efficiencies and Water Productivity of Rice Under Irrigated Semiarid Environment”. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, vol. 40, no. 1, May 2012, pp. 201-1, doi:10.15835/nbha4017761.