Partiality and underspecification in information, languages, and knowledge, 2017: t.p. (Roussanka Loukanova) page 346 (Roussanka Loukanova has master degrees in mathematics from Sofia University (Bulgaria), and in computer science, from Indiana University Bloomomgton, and a PhD degree in mathematics from Moscow State University (Russia). She has been teaching at Sofia University, Indiana University, University of Minnesota, and Uppsala University (Sweden). Currently, she is a researcher at the Department of Mathematics, Stockholm University, Sweden).