On field effect studies and superconductor-insulator transition in high-Tc cupratesG. Dubuis, A.T. Bollinger, D. Pavuna and I. BožovićEur. Phys. J. Special Topics, 222 5 (2013) 1217-1221DOI: https://doi.org/10.1140/epjst/e2013-01916-x