Iteration and coiteration schemes for higher-order and nested datatypesAbel, Andreas; Matthes, Ralph; Uustalu, TarmoTheoretical computer science2005 / 1/2, p. 3-66

6th Workshop on Fixed Points in Computer Science : FICS 2009 : Coimbra, Portugal, 12-13 September 2009 : proceedingsMatthes, Ralph; Uustalu, Tarmo2009 https://www.ester.ee/record=b2506216*est