MAES, C., NETOČNÝ, K., O'KELLY DE GALWAY, W. Low temperature behavior of nonequilibrium multilevel systems. Journal of Physics A-Mathematical and Theoretical. 2014, 47(3), "035002-1"-"035002-11". ISSN 1751-8113. E-ISSN 1751-8121. Available: https://doi.org/10.1088/1751-8113/47/3/035002.