@inproceedings{inproceedingsa67ec13e, title = {Ringlike structures in the density-magnetic-field ''rô' IND. xx' diagram of two-subband quantum Hall systems}, author = {Ferreira, Gerson and Freire, Henrique J. P. and Egues, José Carlos}, year = {2006}, booktitle = {International Conference on Physics and Application of Spin-Related Phenomena in Semiconductors - PASPS} }