@article{DMGAA_2003_23_2_a6,
     author = {Vogel, Hans-J\"urgen},
     title = {Adjointness between theories and strict theories},
     journal = {Discussiones Mathematicae. General Algebra and Applications},
     pages = {163--212},
     year = {2003},
     volume = {23},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGAA_2003_23_2_a6/}
}