@article{EJMCA_2018_6_3_a0,
     author = {M. I. Belishev and A. V. Kaplun},
     title = {Eikonal algebra on a graph of simple structure},
     journal = {Eurasian journal of mathematical and computer applications},
     pages = {4--33},
     publisher = {mathdoc},
     volume = {6},
     number = {3},
     year = {2018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJMCA_2018_6_3_a0/}
}