1. An optimal estimate of the interval on which a multipoint boundary value problem possesses a solution;Melentsova;J. diff. Eqns,1974
2. A best possible estimate of the nonoscillation interval for a linear differential equation with coefficients bounded in Lr;Melentsova;J. diff. Eqns,1977
3. Optimal estimation of the nonoscillation interval for linear differential equations with bounded coefficients;Melentsova;J. diff. Eqns,1981
4. Existence and uniqueness of solutions of boundary value problems for Lipschitz equations;Jackson;J. diff. Eqns,1979
5. Boundary value problems for Lipschitz equations;Jackson,1980