S.Yu. Lukashchuk, “Estimation of parameters in fractional subdiffusion equations by the time integral characteristics method”, Computers & Mathematics with Applications, 62:3 (2011), 834
J. Hristov, “Approximate solutions to fractional subdiffusion equations”, Eur. Phys. J. Spec. Top., 193:1 (2011), 229
А. В. Псху, “Фундаментальное решение диффузионно-волнового уравнения дробного порядка”, Изв. РАН. Сер. матем., 73:2 (2009), 141–182 ; A. V. Pskhu, “The fundamental solution of a diffusion-wave equation of fractional order”, Izv. Math., 73:2 (2009), 351–392