A note on an expressiveness hierarchy for multi-exit iteration.

Luca Aceto Wan Fokkink Anna Ingólfsdóttir A note on an expressiveness hierarchy for multi-exit iteration. 17-23 2003 87 Inf. Process. Lett. 1 http://dx.doi.org/10.1016/S0020-0190(03)00234-5 db/journals/ipl/ipl87.html#AcetoFI03