1. Allard, R. W., 1960. Principles of plant breeding. John Wiley, New York and London.
2. Dogadkina, N. A., 1941. A contribution to the question of genome relations in some species of Fragaria. C.r. Acad. Sci. URSS. 30: 166–168.
3. Evans, W. D. & J. K. Jones, 1967. Incompatibility in Fragaria. Can. J. Genet. Cytol. 9: 831–836.
4. Fedorova, N. J., 1934. Polyploid intespecific hybrids in the genus Fragaria. Genetica 16: 524–541.
5. Ichijima, K., 1930. Studies on the genetics of Fragaria. Z. indukt. Abstamm.- u. VererbLehre. 55: 300–347.