Genetic diversity of the cytoplasm in Triticum and Aegilops. II. Comparison of the cytoplasms between four 4x Aegilops Polyeides species and their 2x relatives Mukai, Y.; Tsunewaki, K. Seiken Ziho (25/26): 67-78 1975 https://eurekamag.com/research/000/387/000387412.php