Hans-E. Porst. Free Internal Groups. Applied Categorical Structures, 20(1):31-42, 2012. [doi]
@article{Porst12,
title = {Free Internal Groups},
author = {Hans-E. Porst},
year = {2012},
doi = {10.1007/s10485-010-9222-3},
url = {http://dx.doi.org/10.1007/s10485-010-9222-3},
researchr = {https://researchr.org/publication/Porst12},
cites = {0},
citedby = {0},
journal = {Applied Categorical Structures},
volume = {20},
number = {1},
pages = {31-42},
}