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Finite element methods by variational principles with relaxed continuity requirement. (English) Zbl 0303.49027
Variat. Meth. Engin., Proc. internat. Conf. Southampton 1972, Vol. I, 3/1 - 3/24 (1973).

49M25 Discrete approximations in optimal control
49S05 Variational principles of physics (should also be assigned at least one other classification number in Section 49-XX)