Serekpaev, N., Seifullin, S., Nogayev, A., Bekbulatov, S., Dorj, B., Batmunkh, L. and Batdelger, B. (2014) “Influence of sowing time productivity of green mass of Sudan grass dry steppe zone in northern Kazakhstan”, Mongolian Journal of Agricultural Sciences, 11(2), pp. 63–67. doi: 10.5564/mjas.v11i2.219.