%0 Journal Article %A Bolesław Kopociński %A Halina Przybysz %T A remark on preventive replacement strategies %J Mathematica Applicanda %D 1979 %P 75-79 %V 7 %N 15 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.14708/ma.v7i15.1480/ %R 10.14708/ma.v7i15.1480 %G pl %F 10_14708_ma_v7i15_1480