%D 1969 %L acta14232 %J Acta scientiarum mathematicarum %T On local properties of pseudo-differential operators %P 263-270 %O Bibliogr.: 270. p. %A Barbu Viorel %N 3-4 %V 30 %K TermĂŠszettudomĂĄny, Matematika, MĹąvelĹdĂŠs