* Crozier, L (2004). «Warmer winters drive butterfly range expansion by increasing survivorship». Ecology 85 (1): 231-241. doi:10.1890/02-0607
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* McNeil, JN; Duchesne R (1977). «Transport of hay and its importance in the passive dispersal of the European skipper, Thymelicus lineola (Lepidoptera:Hesperiidae)». Can. Ent. 109 (9): 1253-1256. doi:10.4039/ent1091253-9
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== Bibliografia ==
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* Duckworth, G; Altwegg R; Guo D (2010). «Soil moisture limits foraging: a possible mechanism for the range dynamics of the hadeda ibis in southern africa». Diversity and Distributions 16: 765-772. doi:10.1111/j.1472-4642.2010.00683.x
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* Mott, CL (2010). "Environmental Constraints to the Geographic Expansion of Plant and Animal Species". Natural Education Knowledge
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* Species Richness, Endemism, and the Choice of Areas for Conservation. Jeremy T. Kerr. Conservation Biology Vol. 11, No. 5 (Oct., 1997), pp. 1094-1100