@article{ELMA_1982__37_141281,
     author = {F. Harary and G. Exoo},
     title = {The forcibly-tree and forcibly-unicyclic degree sequences.},
     journal = {Elemente der Mathematik},
     pages = {41--43},
     publisher = {mathdoc},
     volume = {37},
     year = {1982},
     zbl = {0436.05057},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1982__37_141281/}
}