Algebraic elements in the transformation theory of 2nd order linear oscillatory differential equations
Article:
Borůvka, Otakar
Algebraic elements in the transformation theory of 2nd order linear oscillatory differential equations(English).Acta Fac. Rer. Nat. Univ. Comenianae, Math. 17 (Equadiff II), 1967, 27-36 (more ...)