@article{VNGU_2015_15_3_a2,
     author = {V. S. Antyufeev},
     title = {A brief proof of the formula for layer addition},
     journal = {Sibirskij \v{z}urnal \v{c}istoj i prikladnoj matematiki},
     pages = {24--29},
     publisher = {mathdoc},
     volume = {15},
     number = {3},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VNGU_2015_15_3_a2/}
}