TY  - JOUR
AU  - Singer, Ivan
TI  - On a theorem of V. Pták concerning best approximation of continuous functions in the metric $\int_a^b|x(t)|dt$
JO  - Czechoslovak Mathematical Journal
PY  - 1960
SP  - 425
EP  - 431
VL  - 10
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1960.100423/
DO  - 10.21136/CMJ.1960.100423
LA  - en
ID  - 10_21136_CMJ_1960_100423
ER  -