Aкимов, 1974, Россия
Kelsey, 1935, USA
Glasscock, 1949, USА
Lemoine, 1906, France
Vories, 1930, USА
Saunders, 1942, USA
Saunders, 1929, USА
Klehm, 2000, USА
Smirnov, before 1948, USA
Hollingsworth, 1984, USА
Auten, 1941, USA
Gorobez, 1994, Ukraina
Laning, 1985. USА
Дубров, 1995, Россия
Klehm, patent 3667,1972
Wright, 1980, USА
Smirnow, 1975, USА
Krekler, 1965, USA
Kраснова, 1958, Россия
Saunders, 1938, USA
Klehm. 1952, USA
Lins, 1936, USA
Мains, 1957, USА
Krekler, 1958, USА
Winchell, 1956, USА
Reath, 1992, USA
Klehm, 1981, USА
Wild, 1968, USА
Klehm, 1980, (Plant Patent 4234), USА
Krasnova, 1959, Россия
Harchеnko-Tyran, 1989, Ukraina
