* {{Citation|author-link=S. L. Hakimi|journal=Journal of the Society for Industrial and Applied Mathematics|pages=496–506|title=On realizability of a set of integers as degrees of the vertices of a linear graph. I|volume=10|year=1962}}. | * {{Citation|author-link=S. L. Hakimi|journal=Journal of the Society for Industrial and Applied Mathematics|pages=496–506|title=On realizability of a set of integers as degrees of the vertices of a linear graph. I|volume=10|year=1962}}. |