Some classes of equations of discrete type with harmonic singular operator and convolution. - Pingrun Li; Guangbin Ren (Appl. Math. Comput., 2016)

Generalized convolution-type singular integral equations. - Pingrun Li (Appl. Math. Comput., 2017)

Singular integral equations of convolution type with Cauchy kernel in the class of exponentially increasing functions. - Pingrun Li (Appl. Math. Comput., 2019)

Solvability theory of convolution singular integral equations via Riemann-Hilbert approach. - Pingrun Li (J. Comput. Appl. Math., 2020)

The solvability and explicit solutions of singular integral-differential equations of non-normal type via Riemann-Hilbert problem. - Pingrun Li (J. Comput. Appl. Math., 2020)

Existence of solutions for Volterra singular integral equations in the class of differentiable functions. - Wenwen Zhang; Pingrun Li (Appl. Math. Comput., 2025)