@article{GDZPPN002488388,
title = {Regularized Semigroups, Iterated Cauchy Problems and Equipartition of Energy.},
journal = {Monatshefte f\"ur Mathematik},
volume = {116},
year = {1993},
pages = {47-66},
zbl = {0784.34046},
url = {http://dml.mathdoc.fr/item/GDZPPN002488388}
}
Goldstein, J.A.; de Laubenfels, R. de; Sandefur, J.T. Regularized Semigroups, Iterated Cauchy Problems and Equipartition of Energy.. Monatshefte für Mathematik, Tome 116 (1993) pp. 47-66. http://gdmltest.u-ga.fr/item/GDZPPN002488388/