Yuan, C., Hu, K., & Jacob, N. (2012). On an equation being a fractional differential equation with respect to time and a pseudo-differential equation with respect to space related to Lévy-type processes. Fractional Calculus and Applied Analysis, 15(1), . doi:10.2478/s13540-012-0009-0

Yuan, Chenggui, Ke Hu, and Niels Jacob. "On an Equation Being a Fractional Differential Equation With Respect to Time and a Pseudo-differential Equation With Respect to Space Related to Lévy-type Processes." Fractional Calculus and Applied Analysis 15, no. 1 (2012).

Yuan, Chenggui, Ke Hu, and Niels Jacob. "On an Equation Being a Fractional Differential Equation With Respect to Time and a Pseudo-differential Equation With Respect to Space Related to Lévy-type Processes." Fractional Calculus and Applied Analysis 15.1 (2012).