@inproceedings{Yamanaka2009a, 
     address = "Kolkata, India", 
     author = "Yamanaka, Katsuhisa and Otachi, Yota and Nakano, Shin-ichi", 
     booktitle = "WALCOM 2009: the 3rd International Workshop on Algorithms and Computation", 
     doi = "10.1007/978-3-642-00202-1_13", 
     editor = "Das, Sandip and Uehara, Ryuhei", 
     keyword = "algorithm,enumeration,family tree,graph,ordered tree", 
     link = "http://link.springer.com/chapter/10.1007/978-3-642-00202-1_13", 
     month = "feb", 
     pages = "141--150", 
     publisher = "Springer Berlin Heidelberg", 
     series = "Lecture Notes in Computer Science", 
     title = "Efficient Enumeration of Ordered Trees with k Leaves", 
     uri = "http://link.springer.com/chapter/10.1007/978-3-642-00202-1_13", 
     volume = "5431", 
     year = "2009", 
}

Problems: 163