@article{ZNSL_1977_68_a2,
     author = {D. Yu. Grigor'ev},
     title = {Problem of path connections in graphs},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {26--29},
     publisher = {mathdoc},
     volume = {68},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1977_68_a2/}
}