1. Graph Theory;Bondy,2008
2. R.S.F. Bravo, L.T. Nogueira, F. Protti, C. Vianna, Minimal obstructions of (2,1)-cographs with external restrictions, in: Annals of I ETC - Encontro de Teoria da Computação, CSBC 2016, 2016, Porto Alegre, http://www.pucrs.br/edipucrs/, ISSN: 2175-2761 (in Portuguese).
3. About recognizing (α,β)-classes of polar graphs;Chernyak;Discrete Math.,1986
4. On the polarity and monopolarity of graphs;Churchley;J. Graph Theory,2014
5. Complement reducible graphs;Corneil;Discrete Appl. Math.,1981