@article{Aringhieri2003, 
     author = "Aringhieri, Roberto and Hansen, Pierre and Malucelli, Federico", 
     doi = "10.1007/s10288-002-0008-9", 
     issn = "16194500", 
     journal = "4OR", 
     keyword = "Exact enumeration problems,applications,enumeration of graphs and maps,generating functions,trees", 
     link = "http://link.springer.com/10.1007/s10288-002-0008-9", 
     month = "mar", 
     number = "1", 
     pages = "67--83", 
     title = "Chemical trees enumeration algorithms", 
     uri = "http://link.springer.com/10.1007/s10288-002-0008-9", 
     volume = "1", 
     year = "2003", 
}

Problems: 289