Douglas S. Bridges, William Julian, Ray Mines. A Constructive Treatment of Open and Unopen Mapping Theorems. Math. Log. Q., 35(1):29-43, 1989. [doi]
@article{BridgesJM89,
title = {A Constructive Treatment of Open and Unopen Mapping Theorems},
author = {Douglas S. Bridges and William Julian and Ray Mines},
year = {1989},
doi = {10.1002/malq.19890350105},
url = {http://dx.doi.org/10.1002/malq.19890350105},
researchr = {https://researchr.org/publication/BridgesJM89},
cites = {0},
citedby = {0},
journal = {Math. Log. Q.},
volume = {35},
number = {1},
pages = {29-43},
}