@article{Hu1967, 
     author = "Hu, T. C.", 
     doi = "10.1137/0115017", 
     issn = "0036-1399", 
     journal = "SIAM Journal on Applied Mathematics", 
     link = "http://epubs.siam.org/doi/10.1137/0115017", 
     month = "jan", 
     number = "1", 
     pages = "207--218", 
     title = "Revised Matrix Algorithms for Shortest Paths", 
     uri = "http://epubs.siam.org/doi/10.1137/0115017", 
     volume = "15", 
     year = "1967", 
}

Problems: 441