@inproceedings{Makino2004, 
     address = "Humleb\ae k, Denmark", 
     author = "Makino, Kazuhisa and Uno, Takeaki", 
     booktitle = "SWAT 2004: the 9th Scandinavian Workshop on Algorithm Algorithm Theory", 
     doi = "10.1007/978-3-540-27810-8_23", 
     editor = "Hagerup, Torben and Katajainen, Jyrki", 
     link = "http://link.springer.com/chapter/10.1007/978-3-540-27810-8_23", 
     month = "jul", 
     pages = "260--272", 
     publisher = "Springer Berlin Heidelberg", 
     series = "Lecture Notes in Computer Science", 
     title = "New algorithms for enumerating all maximal cliques", 
     uri = "http://link.springer.com/chapter/10.1007/978-3-540-27810-8_23", 
     volume = "3111", 
     year = "2004", 
}

Problems: 20 21