R. Rannacher, B. Vexler, и W. Wollner. Constrained Optimization and Optimal Control for Partial Differential Equations, том 160 из International series of numerical mathematics, Birkhäuser / Springer, (2012)
K. Mang, M. Walloth, T. Wick, и W. Wollner. ENUMATH, том 139 из Lecture Notes in Computational Science and Engineering, стр. 1185-1193. Springer, (2019)