Alfredo GermaniCostanzo ManesPierdomenico PepeA Twofold Spline Approximation for Finite Horizon LQG Control of Hereditary Systems.1233-1295200039SIAM J. Control. Optim.4https://doi.org/10.1137/S0363012998337461db/journals/siamco/siamco39.html#GermaniMP00