00828nas 2200253 450 00000256720080922110853.00239-726920010214a19831982km-y0itay50------bamulPLahaz---0uu-Bulletin of the Polish Academy of Sciences. MathematicsPolska Akademia NaukWarszawaPanstwowe Wydawnictwo Naukowe1983-fascicoliTrimestrale0010000025652001Bulletin de l'Académie Polonaise des Sciences. Serie des sciences mathématiquesScienzePolska Akademia NaukITUNIPARTHENOPERICAUNIMARC0000025671983-1986PISTBulletin of the Polish Academy of Sciences. Mathematics798261UNIPARTHENOPE