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James, H. F. et al. (2003). Pseudopodoces humilis, a misclassified terrestrial tit (Paridae) of the Tibetan Plateau: evolutionary consequences of shifting adaptive zones. Ibis 145: 185–202.pdf fileArkivigite je 2006-09-21 per la retarkivo Wayback Machine
James, H. F. et al. (2003). Pseudopodoces humilis, a misclassified terrestrial tit (Paridae) of the Tibetan Plateau: evolutionary consequences of shifting adaptive zones. Ibis 145: 185–202.pdf fileArkivigite je 2006-09-21 per la retarkivo Wayback Machine