1. Calculus of Variations;Gelfand,1963
2. Smoothing for linear and nonlinear dynamic systems;Bryson,1963
3. State estimation for infinite-dimensional systems;Balakrishnan;J. Comp. Syst. Sci.,1967
4. Control of distributed parameter systems;Wang,1963
5. State identification of a class of linear distributed systems;Phillipson,1969