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Fred, M.S.; O'Hara, R.B.; Brommer, J.E. (2006). "Consequences of the spatial configuration of resources for the distribution and dynamics of the endangered Parnassius apollo butterfly". Biological Conservation. 130 (2): 183–192. Bibcode:2006BCons.130..183F. doi:10.1016/j.biocon.2005.12.012.
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Brommer, Jon; Fred, Marianne (2001). "Movement of the Apollo butterfly Parnassius apollo related to host plant and nectar plant patches". Ecological Entomology. 24 (2): 125–131. doi:10.1046/j.1365-2311.1999.00190.x. S2CID84057772.
Habel, Jan; Reuter, Manuela; Drees, Claudia; Pfaender, Jobst (2012). "Does Isolation Affect Phenotypic Variability and Fluctuating Asymmetry in the Endangered Red Apollo?". J Insect Conservation. 16 (4): 571–579. doi:10.1007/s10841-011-9442-3. S2CID14821623.