Hussain, M., Karim, A. S., Solaiman, A., & Haque, M. (2012). Effects of Nitrogen and Boron on the Yield and Hollow Stem Disorder of Broccoli (Brassica oleracea var. italica). The Agriculturists, 10(2), 36–45. https://doi.org/10.3329/agric.v10i2.13140