Denis Tsygankov Alexander Pokhilko Ivan Gorbachev CAD System Basic Operations Semantic Generalization to the Designed Product Construction Conformity. 603-610 2017 TE https://doi.org/10.3233/978-1-61499-779-5-603 conf/ispe/2017 db/conf/ispe/ispe2017.html#TsygankovPG17