Engel, K., & Gronau, H. (1985). Sperner theory in partially ordered sets (1. Aufl.). Teubner.
Chicago Style (17th ed.) CitationEngel, Konrad, and Hans-Dietrich Gronau. Sperner Theory in Partially Ordered Sets. 1. Aufl. Leipzig: Teubner, 1985.
MLA (9th ed.) CitationEngel, Konrad, and Hans-Dietrich Gronau. Sperner Theory in Partially Ordered Sets. 1. Aufl. Teubner, 1985.
Warning: These citations may not always be 100% accurate.