Uzma Bashir, Amna Ali, Naureen Akhtar, Haider, M. S., (2014). Pakistan Journal of Weed Science Research 20(4), 439-447. Weed Science Society of Pakistan, Department of Weed Science, Peshawar, Pakistan. English language
Simon, P. C., Stovell, P. L., (1971). Canadian Journal of Comparative Medicine 35, 103-106. English language
Dennis, S. M., Bamford, V. W., (1966). Veterinary Record 79, 105-108. English language
Englert, H. K., (1961). Deutsche Tierarztliche Wochenschrift 68, 110-113. German language