Author: Johnson, C. S., Jr.

Johnson, C. S., Jr.; McMorris, F. R.: A note on two comparability graphs. (English). Mathematica Slovaca, vol. 32 (1982), issue 1, pp. 61-62
Johnson, C. S., Jr.; McMorris, F. R.: Nonsingular semilattices and semigroups. (English). Czechoslovak Mathematical Journal, vol. 26 (1976), issue 2, pp. 280-282

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