@article{00874389,
title = {The theory of },
journal = {Portugaliae Mathematica. Nova S\'erie},
volume = {53},
year = {1996},
pages = {1-22},
zbl = {0849.28002},
language = {en},
url = {http://dml.mathdoc.fr/item/00874389}
}
Lintz, R.G. The theory of . Portugaliae Mathematica. Nova Série, Tome 53 (1996) pp. 1-22. http://gdmltest.u-ga.fr/item/00874389/