Peter T. Johnstone. Fibrations and partial products in a 2-category. Applied Categorical Structures, 1(2):141-179, 1993. [doi]
@article{Johnstone93,
title = {Fibrations and partial products in a 2-category},
author = {Peter T. Johnstone},
year = {1993},
doi = {10.1007/BF00880041},
url = {http://dx.doi.org/10.1007/BF00880041},
researchr = {https://researchr.org/publication/Johnstone93},
cites = {0},
citedby = {0},
journal = {Applied Categorical Structures},
volume = {1},
number = {2},
pages = {141-179},
}