@article{Gabow1978, 
     author = "Gabow, Harold N. and Myers, Eugene W.", 
     doi = "10.1137/0207024", 
     issn = "0097-5397", 
     journal = "SIAM Journal on Computing", 
     keyword = "1,10,252 364,252-364,4,5,6,7,8,9,algorithms of varying efficiency,algorithms varying efficiency,all spanning trees,all spanning trees of,arborescence,bridge,depth first search,depth-first search,directed,directed and,have been proposed,introduction,networks,pp,problem finding,solution electrical,spanning tree,the problem of finding,the solution of electrical,undirected graphs arises,undirected graphs arises in", 
     link = "http://epubs.siam.org/doi/abs/10.1137/0207024", 
     month = "aug", 
     number = "3", 
     pages = "280--287", 
     publisher = "SIAM", 
     title = "Finding All Spanning Trees of Directed and Undirected Graphs", 
     uri = "http://epubs.siam.org/doi/abs/10.1137/0207024", 
     volume = "7", 
     year = "1978", 
}

Problems: 67 68