Karel Spitzer, Vojtech Novotny, Martin Tonner, Jan Leps, Habitat Preferences, Distribution and Seasonality of the Butterflies (Lepidoptera, Papilionoidea) in a Montane Tropical Rain Forest, Vietnam, Journal of Biogeography, Vol. 20, No. 1 (Jan., 1993), pp. 109-121
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Spitzer et al. (1993) studied this question.
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