Masahiro Kato, Dedy Darnaedi, Taxonomic and Phytogeographic Relationships of Diplazium flavoviride, D. pycnocarpon, and Diplaziopsis, American Fern Journal, Vol. 78, No. 3 (Jul. - Sep., 1988), pp. 77-85
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Kato et al. (1988) studied this question.
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