@article{BSL_2015_44_1-2_a2,
     author = {Voutsadakis, George},
     title = {Categorical {Abstract} {Algebraic} {Logic:} {Referential} {\ensuremath{\pi}-Institutions}},
     journal = {Bulletin of the Section of Logic},
     publisher = {mathdoc},
     volume = {44},
     number = {1-2},
     year = {2015},
     url = {http://geodesic.mathdoc.fr/item/BSL_2015_44_1-2_a2/}
}