On the limits of exact scienceNäpinen, LeoModelling, logical and philosophical aspects of foundations of science. Vol. I2016 / p. 160-182 https://www.lap-publishing.com The problems of knowledge as the core of scientific inquiryMüürsepp, PeeterModelling, logical and philosophical aspects of foundations of science. Vol. I2016 / p. 131-159 (Verlag)