1. The numbering of Brouwer's publications corresponds with the numbering of the Collected Works (Brouwer 1975). Page numbers of the collected works are preceded by “CW”, e.g. “CW 73–75” refers to pages 73–75 in the Collected Works. Similarly Œ refers to Borel 1972
2. Foundations of constructive analysis;Bishop,1967
3. Het intuïtionisme bij de Franse wiskundigen;Bockstaele;Verh. Koninkl. Acad. Wetensch. België,1949
4. Leçons sur la théorie des fonctions;Borel,1898
5. Quelques remarques sur les principes de la théorie des ensembles;Borel;Math. Ann.,1904