Abstract
It is shown that the existence of a Steiner triple system of order 19 satisfying certain very restrictive conditions would lead to the completion of a large portion of the incidence matrix of a projective plane of order 10.
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Prince, A.R. Steiner triple systems of order 19 associated with a certain type of projective plane of order 10. Period Math Hung 17, 177–184 (1986). https://doi.org/10.1007/BF01848647
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DOI: https://doi.org/10.1007/BF01848647