Anderson, J.A., N.L. Taylor, and E.G. Williams.
1991. Cytology and fertility of the interspecific hybrid Trifolium ambiguum X T. repens and backcross populations.
Crop Sci. 31: 683-687. http://www.uky.edu/Ag/Agronomy/Department/CloverGC/selectedliterature.htm
Authors: Norman Taylor