L. A. Mironovskii, T. N. Solov'eva, “Analysis of multiplicity of Hankel singular values of control systems”, Avtomat. i Telemekh., 2015, no. 2, 18–33; Autom. Remote Control, 76:2 (2015), 205–218
L. A. Mironovskii, T. N. Solov'eva, “Analysis and synthesis of modally balanced systems”, Avtomat. i Telemekh., 2013, no. 4, 59–79; Autom. Remote Control, 74:4 (2013), 588–603