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@article{PIM_1971_N_S_11_25_a20, author = {Drago\v{s} M. Cvetkovi\'c}, title = {The {Spectral} {Method} {For} {Determining} {The} {Number} {Of} {Trees}}, journal = {Publications de l'Institut Math\'ematique}, pages = {135 }, publisher = {mathdoc}, volume = {_N_S_11}, number = {25}, year = {1971}, url = {http://geodesic.mathdoc.fr/item/PIM_1971_N_S_11_25_a20/} }
Dragoš M. Cvetković. The Spectral Method For Determining The Number Of Trees. Publications de l'Institut Mathématique, _N_S_11 (1971) no. 25, p. 135 . http://geodesic.mathdoc.fr/item/PIM_1971_N_S_11_25_a20/