@inproceedings{Ferreira2011, 
     address = "Saarbr\"{u}cken, Germany", 
     author = "Ferreira, Rui and Grossi, Roberto and Rizzi, Romeo", 
     booktitle = "ESA 2011: the 19th Annual European Symposium on Algorithms", 
     doi = "10.1007/978-3-642-23719-5_24", 
     editor = "Demetrescu, Camil and Halld\'{o}rsson, Magn\'{u}s M.", 
     link = "http://link.springer.com/10.1007/978-3-642-23719-5_24", 
     month = "sep", 
     pages = "275--286", 
     publisher = "Springer Berlin Heidelberg", 
     series = "Lecture Notes in Computer Science", 
     title = "Output-sensitive listing of bounded-size trees in undirected graphs", 
     uri = "http://link.springer.com/10.1007/978-3-642-23719-5_24", 
     volume = "6942", 
     year = "2011", 
}

Problems: 2