1. Åkerman Å, MacKey J (1949) Försök till stegrande av varvetets avkastning. II. Korsningar mellan vår-och höstvete: Beskrivning av Svalöfs Ellavårvete. Sveriges Utsades Forenings Tidskrift. 59: 105–117 (In Swedish)
2. Bulavka NV (1984) Inheritance of differences in vernalization response in winter wheat hybrids. Bull. Appl. Botany, Genet, and Breed. 85: 37–42 (In Russian)
3. Cooper HP (1923) The inheritance of the spring and winter growing habit in cross between typical spring and winter wheat, and the response of wheat plants to artificial light. J. Am. Soc. Agr. 15: 15–25
4. Davidson JL, Christian KR, Jones DB, Bremner PM (1985) Responses of wheat to vernalization and photoperiod. Aust. J. Agric. Res. 36: 347–59
5. Dolgushin DA, Lysenko TD (1929) To question of the nature of winter growth habit. Proc Symp. Genet., Breed., Seed Production and Animal Breed. Leningrad. 3: 189–199 (In Russian)