Bulletin de l'Académie polonaise des sciences.
Polska Akademia Nauk.
Varsovie [Poland] : L'Académie,
1979-1980.
Mathematical reviews
Chemical abstracts
Computer & control abstracts
Electrical & electronics abstracts
Physics abstracts. Science abstracts. Series A
Vol. 27 called also 1.
Physics
Astronomy
Bulletin de l'Académie polonaise des sciences. Série des sciences mathématiques, astronomiques et physiques