$a Möbius functions, incidence algebras and power series representations / Arne Dür. - Berlin [etc.], cop. 1986. $b (Institut für Mathematik der Univ. Innsbruck)
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$a LCA online
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$a http://www.uibk.ac.at/mathematik/duer/ $b (Institut für Mathematik, Innsbruck, Austria; Fields of interest: Discrete Mathematics and Computer Graphics, Coding Theory and Cryptology)