A survey of existing platforms for automation of communication between phone users

Krastev, G., Smrikarova, S., & Teodosieva, M. (). A survey of existing platforms for automation of communication between phone users. // <I>Proceedings<D> of the international e-learning conference' 06 Computer science education with a section PhD students & e-learning, Portugal, Coimbra, 7-8 september, 2006. - Ruse, 2007, p. 2.5-1-2.5-3..