1. Fractional Integrals and Derivatives. Theory and Applications;Samko,1993
2. On historical development of the theory of differentiation of an arbitrary order;Letnikov;Mat. Sb.,1868
3. A short essay on the origin and formation of the theory of fractional integro-differentiation;Potapov;Nonlinear World,2003
4. Essays on the development of fractional calculus in the A.V. Letnikov’s works. To 175th anniversary of A. V. Letnikov, Radioelectronics, Nanosystems;Potapov;Inf. Technol. (Radioelektron. Nanosistemy Inf. Tehnol.),2012
5. The Foundation of Fractional Calculus (with Applications to the Theory of Oil and Gas Production, Underground Hydrodynamics and Dynamics of Biological Systems);Letnikov,2011