TY  - JOUR
AU  - Vaughan, Jerry E.
TI  - On Frolík's characterization of class $P$
JO  - Czechoslovak Mathematical Journal
PY  - 1994
SP  - 1
EP  - 6
VL  - 44
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1994.128448/
DO  - 10.21136/CMJ.1994.128448
LA  - en
ID  - 10_21136_CMJ_1994_128448
ER  -