Foster, Mercedes S. (2007). The potential of fruiting trees to enhance converted habitats for migrating birds in southern Mexico. Bird Conservation International17(1): 45–61. doi:10.1017/S0959270906000554PDF fulltext
Shy, Eyal (1984). "Habitat shift and geographical variation in North American tanagers". Oecologia. 63 (2): 281–285. doi:10.1007/BF00379890. PMID28311026.
Foster, Mercedes S. (2007). The potential of fruiting trees to enhance converted habitats for migrating birds in southern Mexico. Bird Conservation International17(1): 45–61. doi:10.1017/S0959270906000554PDF fulltext
Shy, Eyal (1984). "Habitat shift and geographical variation in North American tanagers". Oecologia. 63 (2): 281–285. doi:10.1007/BF00379890. PMID28311026.