@article{Harary1957, 
     author = "Frank Harary and Ian C. Ross", 
     doi = "10.2307/2785673", 
     issn = "00380431", 
     journal = "Sociometry", 
     link = "http://www.jstor.org/stable/2785673", 
     number = "3", 
     pages = "205-215", 
     publisher = "[American Sociological Association, Sage Publications, Inc.]", 
     title = "A Procedure for Clique Detection Using the Group Matrix", 
     uri = "http://www.jstor.org/stable/2785673", 
     volume = "20", 
     year = "1957", 
}

Problems: 438