@techreport{Ehrenfeucht1973, 
     author = "Ehrenfeucht, Andrzej and Fosdick, Lloyd D. and Osterweil, Leon J.", 
     institution = "Dept. of Computer Sci., Univ. of Colorado, Boulder", 
     link = "http://scholar.colorado.edu/csci_techreports/23", 
     number = "CU-CS-024-23", 
     pages = "1--54", 
     title = "An algorithm for finding the elementary circuits of a directed graph", 
     uri = "http://scholar.colorado.edu/csci_techreports/23", 
     year = "1973", 
}

Problems: 430