@INPROCEEDINGS{ecir13-KRTP,
  AUTHOR 	=	{Dionisis Kontominas and Paraskevi Raftopoulou and Christos Tryfonopoulos and Euripides G.M. Petrakis},
  TITLE 	=	"{DS4: A Distributed Social and Semantic Search System}",
  BOOKTITLE =	"{Proceedings of 35th European Conference on Information Retrieval (ECIR)}",
  YEAR 		=	{2013},
  PAGES 	=	{832--836},
  ADDRESS 	=	"{Moscow, Russia}",
  MONTH 	=	{March},
}