Ki Yung Ahn, Tim Sheard. A hierarchy of mendler style recursion combinators: taming inductive datatypes with negative occurrences. In Manuel M. T. Chakravarty, Zhenjiang Hu, Olivier Danvy, editors, Proceeding of the 16th ACM SIGPLAN international conference on Functional Programming, ICFP 2011, Tokyo, Japan, September 19-21, 2011. pages 234-246, ACM, 2011. [doi]
Abstract is missing.