TY  - JOUR
AU  - B. Pettis
TI  - On Nikaidô's proof of the invariant mean-value theorem
JO  - Studia Mathematica
PY  - 1969
SP  - 193
EP  - 196
VL  - 33
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/sm-33-2-193-196/
DO  - 10.4064/sm-33-2-193-196
LA  - en
ID  - 10_4064_sm_33_2_193_196
ER  -