Recent results in microwave and rf spectroscopy of two-dimensional electron solids R.M. Lewis, Y.P. Chen, G. Sambandamurthy, L.W. Engel, D.C. Tsui, L.N. Pfeiffer et K.W. WestJ. Phys. IV France, 131 (2005) 241-246DOI: https://doi.org/10.1051/jp4:2005131061