@article{01002290, title = {The concept of structural regularity.}, journal = {Portugaliae Mathematica. Nova S\'erie}, volume = {53}, year = {1996}, pages = {435-456}, zbl = {0870.20043}, language = {en}, url = {http://dml.mathdoc.fr/item/01002290} }
Kopamu, Samuel J.L. The concept of structural regularity.. Portugaliae Mathematica. Nova Série, Tome 53 (1996) pp. 435-456. http://gdmltest.u-ga.fr/item/01002290/