TY  - JOUR
AU  - Bruckner, A. M.
TI  - Some Remarks on Extreme Derivates
JO  - Canadian mathematical bulletin
PY  - 1969
SP  - 385
EP  - 388
VL  - 12
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1969-048-x/
DO  - 10.4153/CMB-1969-048-x
ID  - 10_4153_CMB_1969_048_x
ER  -