1. R. Cordovil, Sur l'évaluationt(M; 2, 0) du polynôme de Tutte d'un matroïde et une conjecture de B. Grünbaum rélative aux arrangements de droites du plan.European J. Combin. 1 (1980), 317–322.
2. H. S. M. Coxeter, The classification of zonohedra by means of projective diagrams.J. Math. Pures Appl. 41 (1962), 137–156 (reprinted with improvements inTwelve Geometric Essays, Southern Illinois University Press, Carbondale, IL, 1968).
3. E. S. Fedorov, Nachala Ucheniya o Figurah.Notices Imperial Petersburg Mineral. Soc. 2nd ser. 24 (1995), 1–279 (reprinted in the seriesClassics of Sciences, Academy of Sciences of the USSR, Moscow, 1953).
4. B. Grünbaum,Arrangements and Spreads. American Mathematical Society, Providence, RI, 1972.
5. N. J. Martinov, On conjecture 2.4 of Grünbaum.Mathematics and Education in Mathematics (Proc. 19th Spring Conference of the Union of Bulgarian Mathematicians, Sunny Beach, April 1990). Bulgarian Academy of Science, Sofia, 1990, pp. 112–117.