Hendricks V. F. Logicism, Intuitionism, and Formalism What has Become of Them? / / edited by Vincent F. Hendricks, John Symons, Dirk Dalen, Theo A. F. Kuipers, Teddy Seidenfeld, Patrick Suppes, Jan Woleński, Sten Lindström, Erik Palmgren, Krister Segerberg, Viggo Stoltenberg-Hansen. // Springer eBooks. URL: http://dx.doi.org/10.1007/978-1-4020-8926-8