Y. Xu, P. Ahokangas, S. Yrjölä, and T. Koivumäki. SmartGIFT, volume 245 of Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, page 278-288. Springer, (2018)
M. Iivari, M. Pikkarainen, and T. Koivumäki. PRO-VE, volume 506 of IFIP Advances in Information and Communication Technology, page 323-332. Springer, (2017)