TY  - JOUR
AU  - A. Troelstra
TI  - Non-extensional equality
JO  - Fundamenta Mathematicae
PY  - 1974
SP  - 307
EP  - 322
VL  - 82
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-82-4-307-322/
DO  - 10.4064/fm-82-4-307-322
LA  - en
ID  - 10_4064_fm_82_4_307_322
ER  -