Per Year

 @article{2p-alpnews2013,
    author = {Denti, Enrico and Omicini, Andrea and Calegari, Roberta},
    iris = {11585/230475},
    journal = {ALP Newsletter},
    month = oct,
    publisher = {Association for Logic Programming},
    title = {{\textsf{tu}Prolog}: Making {P}rolog Ubiquitous},
    url = {http://www.cs.nmsu.edu/ALP/2013/10/tuprolog-making-prolog-ubiquitous/},
    year = 2013
}