FURTHER STUDY OF THE EQUIVALENT THEOREM OF HELLINGER-REISSNER AND HU-WASHIZU VARIATIONAL PRINCIPLES
何吉欢
FURTHER STUDY OF THE EQUIVALENT THEOREM OF HELLINGER-REISSNER AND HU-WASHIZU VARIATIONAL PRINCIPLES
He Jihuan
Applied Mathematics and Mechanics (English Edition) . 1999, (5): 545 -556 .