Georgieva, N., I. Nikolova, and P. Marinov-Serafimov. “Comparative Characteristics of Lupinus Albus L. and Lupinus Luteus L. Under Allelopathic Effect of Sorghum Halepense L. (Pers.)”. Pesticides and Phytomedicine / Pesticidi I Fitomedicina, Vol. 30, no. 1, Apr. 2015, doi:10.2298/pif.v30i1.7406.