@article{Piekarski1965, 
     author = "Piekarski, M.", 
     doi = "10.1109/TCT.1965.1082388", 
     issn = "0018-9324", 
     journal = "IEEE Transactions on Circuit Theory", 
     number = "1", 
     pages = "124--125", 
     title = "Listing of All Possible Trees of a Linear Graph", 
     volume = "12", 
     year = "1965", 
}

Problems: 473