A study on optimal control problem with $$\varepsilon ^{\lambda }-$$ ε λ - error bound for stochastic systems with application to linear quadratic problemSamira Boukaf، Mokhtar Hafayed، Messaoud GhebouliInternational Journal of Dynamics and Controlالمجلّد 5، (2)، الصفحات 297-3052015مقال وصول مغلق 1