00450nas 2200181z- 450 9963362843033162451-3148(CKB)3710000000772979(MiAaPQ)55018(EXLCZ)99371000000077297920191120cuuuuuuuu -u- -engScientific BulletinDe Gruyter OpenJOURNAL996336284303316Scientific bulletin1914669UNISA