@misc{_Bulletin_1988, editor={Polska Akademia Nauk.}, copyright={Rights Reserved - Restricted Access}, address={Warsaw}, howpublished={online}, year={1988}, publisher={Państ. Wydaw. Nauk.}, language={eng}, language={rus}, title={Bulletin of the Polish Academy of Sciences. Mathematics.}, type={Text}, keywords={Matematyka -- -- -- -- czasopisma. [KABA]}, }