@article{ZNSL_2018_475_a1,
     author = {N. Yu. Vlasova},
     title = {On contractible  5-vertex subgraphs of a 3-connected graph},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {22--40},
     publisher = {mathdoc},
     volume = {475},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2018_475_a1/}
}