Warzecha, Roman, and Krystyna Salak-Warzecha. “A New Source of Male Sterility in Rye (Secale Cereale L.)”. Plant Breeding and Seed Science 48 (December 21, 2003): 61–65. Accessed September 1, 2024. https://ojs.ihar.edu.pl/index.php/pbss/article/view/721.