Yulia Lipko, Alexander Sviridov, Svetlana Belikova. A UNIFIED MODEL FOR CONVERTING TEXT REQUIREMENTS INTO FORMAL MODELS. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Informatics, Geoinformatics and Remote Sensing, 2017, pp. 53-60. https://doi.org/10.5593/sgem2017/21/s07.008