@article{Tarjan1973, 
     author = "Tarjan, Robert", 
     doi = "10.1137/0202017", 
     issn = "0097-5397", 
     journal = "SIAM Journal on Computing", 
     link = "http://epubs.siam.org/doi/abs/10.1137/0202017", 
     month = "sep", 
     number = "3", 
     pages = "211--216", 
     title = "Enumeration of the Elementary Circuits of a Directed Graph", 
     uri = "http://epubs.siam.org/doi/abs/10.1137/0202017", 
     volume = "2", 
     year = "1973", 
}

Problems: 6