Yves Bertot Ekaterina Komendantskaya Inductive and Coinductive Components of Corecursive Functions in Coq. 25-47 2008 203 Electr. Notes Theor. Comput. Sci. 5 http://dx.doi.org/10.1016/j.entcs.2008.05.018 db/journals/entcs/entcs203.html#BertotK08