@article{ZNSL_2014_421_a7,
     author = {I. A. Krepkiy},
     title = {The sandpile groups of chain-cyclic graphs},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {94--112},
     year = {2014},
     volume = {421},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2014_421_a7/}
}