TY  - JOUR
AU  - G. I. Ivchenko
TI  - How many samples does it take to see all the balls in an urn?
JO  - Matematičeskie zametki
PY  - 1998
SP  - 58
EP  - 63
VL  - 64
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1998_64_1_a6/
LA  - ru
ID  - MZM_1998_64_1_a6
ER  -