@article{702129,
     title = {Canonical equivalence relations for parameter sets},
     booktitle = {Abstracta. 9th Winter School on Abstract Analysis},
     series = {GDML\_Books},
     publisher = {Czechoslovak Academy of Sciences},
     address = {Praha},
     year = {1981},
     pages = {146-150},
     url = {http://dml.mathdoc.fr/item/702129}
}

Prömel, H. J.; Voigt, B. Canonical equivalence relations for parameter sets, dans Abstracta. 9th Winter School on Abstract Analysis, GDML_Books,  (1981), pp. 146-150. http://gdmltest.u-ga.fr/item/702129/