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signed graphs

References:

[1] G. Chartrand, H. Gavlas, F. Harary and M. Schultz: **On signed degrees in signed graphs**. Czech. Math. J. 44 (1994), 677–690. MR 1295143

[2] S. L. Hakimi: **On the realizability of a set of integers as degrees of the vertices of a graph**. SIAM J. Appl. Math. 10 (1962), 496–506. DOI 10.1137/0110037 | MR 0148049

[3] F. Harary: **On the notion of balance in a signed graph**. Michigan Math. J. 2 (1953), 143–146. DOI 10.1307/mmj/1028989917 | MR 0067468

[4] S. F. Kapoor, A. O. Polimeni and C. E. Wall: **Degree sets for graphs**. Fund. Math. 65 (1977), 189–194. MR 0480200

[5] J. H. Yan, K. W. Lih, D. Kuo and G. J. Chang: **Signed degree sequences of signed graphs**. J. Graph Theory 26 (1997), 111–117. DOI 10.1002/(SICI)1097-0118(199710)26:2<111::AID-JGT6>3.0.CO;2-V | MR 1469358