TY  - JOUR
AU  - Ellentuck, Erik
TI  - On the form of functions which preserve regressive isols
JO  - Compositio Mathematica
PY  - 1973
SP  - 283
EP  - 302
VL  - 26
IS  - 3
PB  - Noordhoff International Publishing
UR  - http://www.numdam.org/item/CM_1973__26_3_283_0/
LA  - en
ID  - CM_1973__26_3_283_0
ER  -