1. A Kuratowski theorem for the projective plane;Archdeacon;J. Graph Theory,1981
2. M. Derka, Planar graph emulators: Fellowsʼ conjecture, Bc. thesis, Masaryk University, Brno, 2010, http://is.muni.cz/th/255724/fi_b/thesis.pdf.
3. Towards finite characterization of planar-emulable non-projective graphs;Derka;Congr. Numer.,2011
4. G. Ding, P. Iverson, Internally 4-connected projective graphs, Manuscript, Louisiana State University, 2011.
5. M. Fellows, Encoding graphs in graphs, PhD dissertation, Univ. of California, San Diego, 1985.