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Song, W. q., X. l. Li & Y. l. Chen. 1989. Studies on the karyotype evolution and relationship of Maloideae. Pp. 327--333 in D. Hong (editor), Plant Chromosome Research 1987.
Chen, R. y., W. q. Song, X. l. Li, M. x. Li, G. l. Liang & C. b. Chen. 2003. Chromosome Atlas of Major Economic Plants Genome in China, Vol. 3, Chromosome Atlas of Garden Flowering Plants in China. Science Press, Beijing.