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Page 2850 of Mathematical Reviews Vol. , Issue 83h
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1983
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Mathematical Reviews
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a unital which is *embeddable*, and *isomorphic* with its dual, but not *the* set of absolute points of a polarity (in fact examples exist in each of *the* four known *projective* *planes* of order 9), (iii) a unital ...
Piper [*Graph* theory and combinatorics (Milton Keynes, 1978), pp. 98-105, Pitman, San Francisco, Calif., 1979; MR 81i:05045] by exhibiting (i) a unital that is not *embeddable* in a *projective* *plane*, (ii) ...