Some classes of recursive functions
Grzegorczyk, Andrzej
GDML_Books, (1953), p.

Introduction§ 1. Preliminary notions§ 2. Elementary functions§ 3. Classes based on limited recursion§ 4. Classes Є n§ 5. Applications of the class Є n

EUDML-ID : urn:eudml:doc:219317 
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     author = {Grzegorczyk, Andrzej},
     title = {Some classes of recursive functions},
     series = {GDML\_Books},
     publisher = {Instytut Matematyczny Polskiej Akademi Nauk},
     address = {Warszawa},
     year = {1953},
     zbl = {0052.24902},
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Grzegorczyk, Andrzej. Some classes of recursive functions. GDML_Books (1953),  http://gdmltest.u-ga.fr/item/bwmeta1.element.dl-catalog-7a63dd3b-70a7-4bc3-998b-79c4e6d0447a/