Almuthaybiri, S. S., J. M. Jonnalagadda, and C. C. Tisdell. “Existence and Uniqueness of Solutions to Discrete, Third-Order Three-Point Boundary Value Problems”. CUBO, A Mathematical Journal, vol. 23, no. 3, Dec. 2021, pp. 441–455, doi:10.4067/S0719-06462021000300441.