@article{1183486556,
author = {Michal, A. D.},
title = {Functional invariants, with a continuity of order $p$, of one-parameter
Fredholm and Volterra transformation groups},
journal = {Bull. Amer. Math. Soc.},
volume = {31},
number = {9-10},
year = {1925},
pages = { 335-346},
language = {en},
url = {http://dml.mathdoc.fr/item/1183486556}
}
Michal, A. D. Functional invariants, with a continuity of order $p$, of one-parameter
Fredholm and Volterra transformation groups. Bull. Amer. Math. Soc., Tome 31 (1925) no. 9-10, pp. 335-346. http://gdmltest.u-ga.fr/item/1183486556/