Zoltán Ésik, Werner Kuich. On Power Series over a Graded Monoid. In Cristian S. Calude, Rusins Freivalds, Iwama Kazuo, editors, Computing with New Resources - Essays Dedicated to Jozef Gruska on the Occasion of His 80th Birthday. Volume 8808 of Lecture Notes in Computer Science, pages 49-55, Springer, 2014. [doi]
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