Stevenson, F. W. (1972). Projective planes. W. H. Freeman.
Lua i Stíl Chicago (17ú heag.)Stevenson, Frederick W. Projective Planes. San Francisco: W. H. Freeman, 1972.
Lua MLA (9ú heag.)Stevenson, Frederick W. Projective Planes. W. H. Freeman, 1972.
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