Bretagnolle, V., Attié, C., Pasquet, E., (1998) "Cytochrome-B evidence for validity and phylogenetic relationships of Pseudobulweria and Bulweria (Procellariidae)" Auk, nr.115, vol.1, sid:188–195, PDFArkiverad 17 december 2008 hämtat från the Wayback Machine.
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Bretagnolle, V., Attié, C., Pasquet, E., (1998) "Cytochrome-B evidence for validity and phylogenetic relationships of Pseudobulweria and Bulweria (Procellariidae)" Auk, nr.115, vol.1, sid:188–195, PDFArkiverad 17 december 2008 hämtat från the Wayback Machine.