(en) Benjamin Vallejo Jr, Alexander Aloyab, Perry Ong et Annette Tamino, « Spatial Patterns of Bird Diversity and Abundance in an Urban Tropical Landscape: The University of the Philippines (UP) Diliman Campus », Science Diliman: A Journal of Pure and Applied Sciences, vol. 20, no 1, (ISSN2012-0818, lire en ligne, consulté le )
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(en) Benjamin Vallejo Jr, Alexander Aloyab, Perry Ong et Annette Tamino, « Spatial Patterns of Bird Diversity and Abundance in an Urban Tropical Landscape: The University of the Philippines (UP) Diliman Campus », Science Diliman: A Journal of Pure and Applied Sciences, vol. 20, no 1, (ISSN2012-0818, lire en ligne, consulté le )