@misc{Ungar_Šime_The_1979,
 author={Ungar, Šime},
 volume={27},
 number={2},
 editor={Polska Akademia Nauk.},
 editor={Państwowe Wydawnictwo Naukowe (1951–1992)},
 copyright={Rights Reserved - Restricted Access},
 address={Varsovie},
 howpublished={online},
 year={1979},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={eng},
 language={rus},
 type={Text},
 title={The van Kampen theorem for fundamental pro-groups},
}