1. Artin, E.: Geometrie Algebra. Interscience Publishers, New York, 1957.
2. Brezuleanu, A.; Rădulescu, D.C.: About the collineations on open subsets of Rm and Pm(R). Preprint series in Mathematics nr.71/1981, INCREST, Bucharest.
3. Brezuleanu, A.; Rădulescu, D.C.: Characterizing lineations on open subsets of projective spaces. Preprint series in Math. nr. 58/1982, INCREST, Bucharest.
4. Carter, D.S.; Vogt, A.: Collinearity-preserving functions between projective Desarguesian planes. Memoirs AMS, vol. 27, Nr.235, Sept. 1980, 1–43.
5. Carter, D.S.; Vogt, A.: Collinearity preserving functions between affine Desarguesian planes. Memoirs AMS, vol. 27, Nr.235, Sept.1980, 47–95.