1. The heartbeat considered as a relaxation oscillation and an electrical model of the heart;van der Pol;Philos. Mag.,1928
2. The mathematical formulation of the problem of conduction of impulses in a network of connected excitable elements, specifically in cardiac muscle;Wiener;Arch. Inst. Cardiol. Mex.,1946
3. Etude de l'equation de la diffusion avec crossance de la quantite de matiere et son application a un probleme biologique;Kolmogoroff;Bull. Univ. Moscow Ser. Int. A,1937
4. Electric current flow in excitable cells;Jack,1975
5. A quantitative description of membrane current and its application to conduction and excitation in nerve;Hodgkin;J. Physiol.,1952