Field tuning of the electron and hole populations in the ruthenate Wei-Li Lee, M. K. Haas, G. Lawes, A. P. Ramirez, R. J. Cava and N. P. OngEurophys. Lett., 63 6 (2003) 860-866DOI: https://doi.org/10.1209/epl/i2003-00599-0