Chorny, Oleh     Program development of information environment for exchanging project messages in CAD [Текст] / Oleh Chorny, Oleksandr Markelov, Pavlo Denysyuk // Computer science and information technologies CSIT 2010 : proc. of the V Intern. sci. and techn. conf., 14-16 Oct. 2010, Lviv, Ukraine / Lviv Polytechnic Nat. Univ. — Lviv : Publ. House Vezha & Co, 2010. — P. 132-133.