@inproceedings{inproceedings924e5d1c, title = {Constraining the absolute neutrino mass scale and Majorana CP violating phases by future O'upsilon''beta''beta' decay experiments}, author = {Nunokawa, Hiroshi and Teves, Walter José da Costa and Funchal, R. Zukanovich}, year = {2002}, publisher = {SBF}, booktitle = {Encontro Nacional de Física de Partículas e Campos} }