@article{BSL_2016_45_2_a2,
     author = {Voutsadakis, George},
     title = {Categorical {Abstract} {Logic:} {Hidden} {Multi-Sorted} {Logics} as {Multi-Term} {\ensuremath{\pi}-Institutions}},
     journal = {Bulletin of the Section of Logic},
     publisher = {mathdoc},
     volume = {45},
     number = {2},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BSL_2016_45_2_a2/}
}