Castelli, Gabriella, Marco Mamei, Alberto Rosi, and Franco Zambonelli. “How to Develop Pervasive Social Applications With the SAPERE Middleware”. COMPUTING AND INFORMATICS 34, no. 1 (June 19, 2015): 185–209. Accessed September 18, 2021. http://www.cai.sk/ojs/index.php/cai/article/view/2047.