Tzovaras D, Votis K, Kaklanis N, Oikonomou T, Kastori M, Lopes R, Michael-Loupis C, Ringler M, Papadopoulou M, Partarakis N. ACCESSIBLE EC Project. D 3.3 a?ACCESSIBLE System Architecture Specification (Beta). CERTH/ITI (2009).  2009.