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@article{DM_1992_4_2_a7, author = {G. I. Kalmykov}, title = {Partial ordering of trees and the classification of connected graphs and blocks}, journal = {Diskretnaya Matematika}, pages = {66--73}, publisher = {mathdoc}, volume = {4}, number = {2}, year = {1992}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DM_1992_4_2_a7/} }
G. I. Kalmykov. Partial ordering of trees and the classification of connected graphs and blocks. Diskretnaya Matematika, Tome 4 (1992) no. 2, pp. 66-73. http://geodesic.mathdoc.fr/item/DM_1992_4_2_a7/