@misc{_Bulletin_1979,
 volume={27},
 editor={Polska Akademia Nauk.},
 editor={Państwowe Wydawnictwo Naukowe (1951–1992)},
 number={5},
 copyright={Rights Reserved - Restricted Access},
 address={Varsovie},
 howpublished={online},
 year={1979},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={eng, fre},
 type={Text},
 title={Bulletin de lʾAcademie Polonaise des Sciences. Série des Sciences Mathématiques.},
}