@article{UZKU_2021_163_3_a4,
     author = {V. I. Pan'zhenskii and A. O. Rastrepina},
     title = {Contact and almost contact structures on the real extension of the {Lobachevsky} plane},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {291--303},
     publisher = {mathdoc},
     volume = {163},
     number = {3},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_2021_163_3_a4/}
}