更改

  | year = 1990}}.</ref><ref>{{citation

  | year = 1990}}.</ref><ref>{{citation

  | last1 = Bertault | first1 = François

  | last1 = Bertault | first1 = François

  | last2 = Eades | first2 = Peter | author2= Peter Eades

  | last2 = Eades | first2 = Peter | author2-link = Peter Eades

  | contribution = Drawing hypergraphs in the subset standard

  | contribution = Drawing hypergraphs in the subset standard

  | doi = 10.1007/3-540-44541-2_15

  | doi = 10.1007/3-540-44541-2_15

  | title = Proc. 8th International Symposium on Graph Drawing (GD 2000)

  | title = Proc. 8th International Symposium on Graph Drawing (GD 2000)

  | volume = 1984

  | volume = 1984

  | year = 2001| title = International Symposium on Graph Drawing

  | year = 2001| title -link = International Symposium on Graph Drawing

  | isbn =  

  | isbn =  

  | doi-access = free

  | doi-access = free