Danny J. Gustafson, Gabriela Romano, Roger Earl Latham, John K. Morton, Amplified Fragment Length Polymorphism Analysis of Genetic Relationships among the Serpentine Barrens Endemic Cerastium velutinum Rafinesque var. villosissimum Pennell (Caryophyllaceae) and Closely Related Cerastium Species, The Journal of the Torrey Botanical Society, Vol. 130, No. 3 (Jul. - Sep., 2003), pp. 218-223
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Gustafson et al. (2003) studied this question.
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