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Chicot, K. M.; Grannell, M. J.; Griggs, T. S. and Webb, B. S.
(2010).
DOI: https://doi.org/10.1002/jcd.20227
Abstract
We give a general construction for Steiner triple systems on a countably infinite point set and show that it yields 2N0 nonisomorphic systems all of which are uniform and r-sparse for all finite r≥4.