@article{VTGU_2020_67_a1,
     author = {M. S. Bukhtyak},
     title = {Pseudo-minimality and ruled surfaces},
     journal = {Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika},
     pages = {18--27},
     publisher = {mathdoc},
     number = {67},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTGU_2020_67_a1/}
}