Allen, J.A. (1910). Mammals from Palawan Island, Philippine Islands. Bulletin of the American Museum of Natural History 28: 13–17.

Boissière, M., and Liswanti, N. (2006). Biodiversity in a Batak village of Palawan (Philippines). A multidisciplinary assessment of local perceptions and priorities. CIFOR, Bogor, Indonesia.

Esselstyn, J.A., Widmann, P., and Heaney, L.R. (2004). The mammals of Palawan Island, Philippines. Proceedings of the Bilogical Society of Washington 117(3): 271-302.

Groves, C.P. (1981). Ancestors for the Pigs: Taxonomy and Phylogeny of the Genus Sus. Tech. Bull. No. 3, Dept. of Prehistory, Research School of Pacific Studies, Australian National University, Canberra: 96 pp.

Groves, C.P. (1997). Taxonomy of wild pigs (Sus) of the Philippines. Zoological Journal of the Linnean Society 120(2): 163-191.

Lucchini, V., Meijaard, E., Diong, C.H., Groves, C.P., and Randi, E. (2005). New phylogenetic perspectives among species of South-east Asian wild pig (Sus sp.) based on mtDNA sequences and morphometric data. Journal of Zoology 266(1): 25-35.

Meijaard, E. & Widmann, P. (2017). Sus ahoenobarbus. The IUCN Red List of Threatened Species 2017: e.T21177A44140029. http://dx.doi.org/10.2305/IUCN.UK.2017-3.RLTS.T21177A44140029.en. Downloaded on 22 March 2019.

Rabor, D.S. (1986). Guide to the Philippine Flora and Fauna, Vol. XI: Birds, Mammals. Natural Resources Management Centre, Ministry of Natural Resources and Univ. of the Philippines. Pp. 181.

Widmann, P. (2017). Palawan Bearded Pig Sus ahoenobarbus (Huet, 1888). Pp. 170-174 in Melletti, M., and Meijaard, E. (eds). Ecology, Conservation, and Management of Wild Pigs and Peccaries. Cambridge University Press, Cambridge, UK.

Widmann, P., Dumalag, R.M., Widmann, I.D.L., Lachenmaier, K., Diaz, S.H., Villafuerte, D.D., and Matillano, J.D. (2008). Observations on the Mammals of Lowland Forests in the Pagdanan Range and Dumaran Island, Palawan, Philippines. In: Widmann, I.L., Widmann, P., Schoppe, S., van den Beukel, D., and Espeso, M. (eds.) (2008). Conservation Studies on Palawan Biodiversity: A compilation of researches conducted in cooperation with or initiated by Katala Foundation Inc.. Katala Foundation, Inc. Puerto Princesa City, Palawan, Philippines.

Caldecott, J.O., Blouch, R.A., and MacDonald, A.A. (1993). The bearded pig (Sus barbatus). In: W.L.R. Oliver (ed.). Pigs, peccaries, and hippos. Status survey and conservation action plan. IUCN/SSC Pigs and Peccaries Specialist group and IUCN/SSC Hippos Specialist Group, Gland, Switzerland. pp.136-145.

Cruz, R.M., Villafuerte-van den Beukel, D., Widmann, I.D., Schoppe, S. and Widmannn, P. (2009). Wildlife trade in southern Palawan, Philippines. In: I.D. Widmann, P. Widmann, S. Schoppe, D. van den Beukel and M. Espeso (eds), Conservation Studies on Palawan Biodiversity, pp. 171-178. Katala Foundation, Inc., Puerto Princesa City, Philippines.

de Guia, A.P.O. (1999). Distribution of non-volant mammals of nine small islands of the Calamianes Island Group, Northern Palawan, Philippines. Asia Life Sciences 8(2): 121-128.

Everett, A.H. (1891). Wild Swine of Palawan and the Philippines. Nature 43(1114): 416.

Groves, C.P. (2001). Taxonomy of wild pigs of Southeast Asia. Asian Wild Pig News 1: 2-3.

Heaney, L.R., Balete, D.S, Dolar, M.L., Alcala, A.C., Dans, A.T.L., Gonzales, P.C., Ingle, N.R., Lepiten, M.V., Oliver, W.L.R., Ong, P.S., Rickart, E.A., Tabaranza, B.R. Jr., and Utzurrum, R.C.B. (1998). A synopsis of the Mammalian Fauna of the Philippine Islands. Fieldiana: Zoology 88: 1-61.

Hoogstraal, H. (1951). Philippine Zoological Expedition, 1946-1947. Narrative and itinerary. Fieldiana: Zoology 33: 1-86.

Marler, P.N., Jose, E.D., Castro, L.S.G., and Gonzalez, J.B. (2018). Mammals of Cleopatra’s Needle Critical Habitat: Outcomes of a rapid assessment. The Palawan Scientist 10: 84-103.

Mudar, K.M. (1986). A morphometric analysis of the five subspecies of Sus barbatus, the bearded pig. (Unpubl.) M.Sc. thesis, Michigan State University: 86 pp.

Oliver, W.L.R. (1992). The taxonomy, distribution and status of Philippine wild pigs. Silliman Journal 36(1): 55-64.

Oliver, W.L.R. (1993). Threatened endemic artiodactyls of the Philippines: status and future priorities. International Zoo Yearbook 32:131-144.

Oliver, W.L.R. (1995). The taxonomy, distribution and status of Philippine wild pigs. IBEX (Journal of Mountain Ecology) 3: 26-32.

Oliver, W.L.R., and Villamor, C.I. (1993). The distribution and status of the Calamian deer, Cervus (= Axis) calamianensis, and the Palawan bearded pig, Sus barbatus ahoenobarbus, in the the Calamian Islands, Palawan Province. (Unpubl.) rep.: 39 pp..

Quinnell, R., and Balmford, A. (1988). A future for Palawan's forests? Oryx 22(1): 30-35.

Sanborn, C.C. (1952). Philippine Zoological Expedition 1946-47. Fieldiana: Zoology 33: 89-158.