TY  - JOUR
AU  - Hemmerling, Armin
TI  - Hierarchies of function classes defined by the first-value operator
JO  - RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications
PY  - 2008
SP  - 253
EP  - 270
VL  - 42
IS  - 2
PB  - EDP-Sciences
UR  - http://www.numdam.org/articles/10.1051/ita:2007031/
DO  - 10.1051/ita:2007031
LA  - en
ID  - ITA_2008__42_2_253_0
ER  -