Gelbukh, Irina. "The co-rank of the fundamental group: The direct product, the first Betti number, and the topology of foliations"
Mathematica Slovaca, vol. 67, no. 3, 2017, pp. 645-656.
https://doi.org/10.1515/ms-2016-0298
Gelbukh, I. (2017). The co-rank of the fundamental group: The direct product, the first Betti number, and the topology of foliations.
Mathematica Slovaca,
67(3), 645-656.
https://doi.org/10.1515/ms-2016-0298
Gelbukh, I. (2017) The co-rank of the fundamental group: The direct product, the first Betti number, and the topology of foliations. Mathematica Slovaca, Vol. 67 (Issue 3), pp. 645-656.
https://doi.org/10.1515/ms-2016-0298
Gelbukh, Irina. "The co-rank of the fundamental group: The direct product, the first Betti number, and the topology of foliations"
Mathematica Slovaca 67, no. 3 (2017): 645-656.
https://doi.org/10.1515/ms-2016-0298
Gelbukh I. The co-rank of the fundamental group: The direct product, the first Betti number, and the topology of foliations.
Mathematica Slovaca. 2017;67(3): 645-656.
https://doi.org/10.1515/ms-2016-0298