Electronic reproduction. [S.l.] : HathiTrust Digital Library, 2010.
Master and use copy. Digital master created according to Benchmark for Faithful Digital Reproductions of Monographs and Serials, Version 1. Digital Library Federation, December 2002. http://purl.oclc.org/DLF/benchrepro0212
Mode of access: World Wide Web.
English, French, German, and Italian.
Vols. for 1952- issued by Polska Akademia Nauk; later vols. by the academy’s Instytut Matematyczny.
Description based on: Vol. 167, no. 1 (2001); title from contents screen (publisher’s Web site, viewed Dec. 19, 2012).