TY  - DATA
AU  - Otakar Borúvka
TI  - Foundation of the Theory of Groupoids and Groups
SN  - 9783034841214
PY  - 1976///
PB  - Springer Basel
KW  - Mathematics and Statistics
UR  - https://doi.org/10.1007/978-3-0348-4121-4
ER  -