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Heaney, Lawrence R.; Balete, Danilo S.; Veluz, Maria Josefa; Steppan, Scott J.; Esselstyn, Jacob A.; Pfeiffer, Andrew W.; Rickart, Eric A. (January 2014). "Two new species of Philippine forest mice (Apomys, Muridae, Rodentia) from Lubang and Luzon Islands, with a redescription of Apomys sacobianus Johnson, 1962". Proceedings of the Biological Society of Washington. 126 (4): 395–413. doi:10.2988/0006-324X-126.4.395. S2CID49347286.
Villanueva, Zandro Vasquez (2009). Cultural Encounters and Transformation of Early Historical Polities on Lubang Island, the Philippines, Ca. A.D. 1200-1800 (Thesis). hdl:10150/195058. OCLC659752060, 1104354100.[page needed]
Heaney, Lawrence R.; Balete, Danilo S.; Veluz, Maria Josefa; Steppan, Scott J.; Esselstyn, Jacob A.; Pfeiffer, Andrew W.; Rickart, Eric A. (January 2014). "Two new species of Philippine forest mice (Apomys, Muridae, Rodentia) from Lubang and Luzon Islands, with a redescription of Apomys sacobianus Johnson, 1962". Proceedings of the Biological Society of Washington. 126 (4): 395–413. doi:10.2988/0006-324X-126.4.395. S2CID49347286.
Villanueva, Zandro Vasquez (2009). Cultural Encounters and Transformation of Early Historical Polities on Lubang Island, the Philippines, Ca. A.D. 1200-1800 (Thesis). hdl:10150/195058. OCLC659752060, 1104354100.[page needed]