@article{GDZPPN002220997, title = {On the Openness of Continuous Averagings.}, journal = {Manuscripta mathematica}, volume = {25}, year = {1978}, pages = {1-8}, zbl = {0378.46002}, url = {http://dml.mathdoc.fr/item/GDZPPN002220997} }
Clausing, A. On the Openness of Continuous Averagings.. Manuscripta mathematica, Tome 25 (1978) pp. 1-8. http://gdmltest.u-ga.fr/item/GDZPPN002220997/