Jenkins G.J., Angel P., Joint Constraint Modeling Using Evolved Topology Generalized Multi-Layer Perceptrons (GMLP), IJSSST, Cyf. 9, Rhif 4, Rhagfyr 2008, ISSN: 1473-804x ar-lein, 1473-8031
Angel, P. Identifying Species of Parasitic Wasp using Artificial Neural Networks. 5ed Cynhadledd Ryngwladol ar Wybodeg Ecolegol (ISEI5). 2006.
Gold C., Angel P., Voronoi Hierarchies , Lecture Notes in Computer Science, 2006, Volume 4197/2006, 99-111, DOI: 10.1007/11863939_7
Angel, P, "Automating the Identification of Species of Parasitic Wasp using Image Processing and Neural Networks", Cyflwyniad Poster, 2il Symposiwm Rhyngwladol ar Dechnoleg Gwybodaeth mewn Ymchwil Bioamrywiaeth, St Petersburg, 2001.
Angel, P, Morris, C.W., "Analysing the Mallat Wavelet Transform to Delineate Contour and Textural Features", Computer Vision and Image Understanding, Cyf 80, Rhif, 3, tt. 267-288, 2000.
Angel, P. "Multiscale Image Analysis for the Automated Localisation of Taxonomic Landmark Points and the Identification of Species of Parasitic Wasp", Ysgol Gyfrifiadura, Prifysgol Morgannwg, 2000.
Angel, P, Morris, C.W, "A Neural Network Pipeline Architecture for Image Feature Extraction", 1st Int. Conf. in Imaging Science, Systems and Technology. Ed. H. Arabnia, 1997.