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Probatova, N. S. & A. P. Sokolovskaya. 1983. Chromosome numbers in Adoxaceae, Chloranthaceae, Cupressaceae, Juncaceae, Poaceae. Bot. Zhurn. SSSR 68 (12): 1683.
TARA, M. 1973. Cytogenetic studies on natural intergeneric hybridization in Aster alliances. II. Heteropappus hispidus (2n=36) X Kalimeris incisa (2n=72l. J. Sci. Hiroshima Univ. Ser. B, Div. 2, 14(3): 107~