@article{GDZPPN002480034, title = {Invariant Density Estimation.}, journal = {Monatshefte f\"ur Mathematik}, volume = {82}, year = {1976}, pages = {315-324}, zbl = {0361.62030}, url = {http://dml.mathdoc.fr/item/GDZPPN002480034} }
Wertz, Wolfgang. Invariant Density Estimation.. Monatshefte für Mathematik, Tome 82 (1976) pp. 315-324. http://gdmltest.u-ga.fr/item/GDZPPN002480034/