更改

* {{Cite book |author1=Biggs, Norman |author2=Lloyd, E. H. |author3=Wilson, Robin J. | title=Graph theory, 1736-1936 | date=1986 | publisher=Clarendon Press | location=Oxford [Oxfordshire] | isbn=0-19-853916-9 | pages=|title-link=Graph Theory, 1736–1936}}

* {{Cite book |author1=Biggs, Norman |author2=Lloyd, E. H. |author3=Wilson, Robin J. | title=Graph theory, 1736-1936 | date=1986 | publisher=Clarendon Press | location=Oxford [Oxfordshire] | isbn=0-19-853916-9 | pages=|title-link=Graph Theory, 1736–1936}}

* {{Cite book | last=Harary | first=Frank | authorlink=Frank Harary | title=Graph theory | date=1969 | publisher=Addison-Wesley Publishing | location=Reading, Mass. | isbn=0-201-41033-8 | pages=}}

* {{Cite book | last=Harary | first=Frank | Frank Harary | title=Graph theory | date=1969 | publisher=Addison-Wesley Publishing | location=Reading, Mass. | isbn=0-201-41033-8 | pages=}}

* {{Cite book |author1=Harary, Frank |author2=Palmer, Edgar M. | title=Graphical enumeration | date=1973 | publisher=New York, Academic Press | location= | isbn=0-12-324245-2 | pages=}}

* {{Cite book |author1=Harary, Frank |author2=Palmer, Edgar M. | title=Graphical enumeration | date=1973 | publisher=New York, Academic Press | location= | isbn=0-12-324245-2 | pages=}}