@article{PORMA_1996__53_4_47689,
     author = {Kopamu, Samuel J.L.},
     title = {The concept of structural regularity.},
     journal = {Portugaliae mathematica},
     pages = {435--456},
     year = {1996},
     volume = {53},
     number = {4},
     zbl = {0870.20043},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1996__53_4_47689/}
}