@article{MacWilliams1958, 
     author = "MacWilliams, J.", 
     doi = "10.1109/TCT.1958.1086460", 
     issn = "00962007", 
     journal = "IRE Transactions on Circuit Theory", 
     number = "3", 
     pages = "228--229", 
     title = "Topological Network Analysis as a Computer Program", 
     volume = "5", 
     year = "1958", 
}

Problems: 490