@article{701236,
     title = {Conditional symmetries of stable measures on $R^n$
               },
     booktitle = {Abstracta. 9th Winter School on Abstract Analysis},
     series = {GDML\_Books},
     publisher = {Czechoslovak Academy of Sciences},
     address = {Praha},
     year = {1981},
     pages = {109-109},
     url = {http://dml.mathdoc.fr/item/701236}
}

Linde, W.; Mathé, P. Conditional symmetries of stable measures on $R^n$
               , dans Abstracta. 9th Winter School on Abstract Analysis, GDML_Books,  (1981), p. 109. http://gdmltest.u-ga.fr/item/701236/