[[1] Grzegorz Bancerek. The fundamental properties of natural numbers. Formalized Mathematics, 1(1):41-46, 1990.]Search in Google Scholar
[[2] Adam Grabowski, Artur Korniłowicz, and Adam Naumowicz. Four decades of Mizar. Journal of Automated Reasoning, 55(3):191-198, 2015. doi: 10.1007/s10817-015-9345-1.10.1007/s10817-015-9345-1]Search in Google Scholar
[[3] Adam Grabowski, Artur Korniłowicz, and Christoph Schwarzweller. On algebraic hierarchies in mathematical repository of Mizar. In M. Ganzha, L. Maciaszek, and M. Paprzycki, editors, Proceedings of the 2016 Federated Conference on Computer Science and Information Systems (FedCSIS), volume 8 of Annals of Computer Science and Information Systems, pages 363-371, 2016. doi: 10.15439/2016F520.10.15439/2016F520]Search in Google Scholar
[[4] Nathan Jacobson. Lecture Notes in Abstract Algebra, III. Theory of Fields and Galois Theory. Springer-Verlag, 1964.]Search in Google Scholar
[[5] Manfred Knebusch and Claus Scheiderer. Einf¨uhrung in die reelle Algebra. Vieweg-Verlag, 1989.10.1007/978-3-322-85033-1]Search in Google Scholar
[[6] Andrzej Kondracki. Basic properties of rational numbers. Formalized Mathematics, 1(5): 841-845, 1990.]Search in Google Scholar
[[7] Eugeniusz Kusak, Wojciech Leonczuk, and Michał Muzalewski. Abelian groups, fields and vector spaces. Formalized Mathematics, 1(2):335-342, 1990.]Search in Google Scholar
[[8] Alexander Prestel. Lectures on Formally Real Fields. Springer-Verlag, 1984.10.1007/BFb0101548]Search in Google Scholar
[[9] Knut Radbruch. Geordnete K¨orper. Lecture Notes, University of Kaiserslautern, Germany, 1991.]Search in Google Scholar
[[10] Michał J. Trybulec. Integers. Formalized Mathematics, 1(3):501-505, 1990.]Search in Google Scholar