1Melenk J. M,Babuska T. The partition of unity finiteele ment method:Basic theory and application [J]. Comput Method Appl Mech Engrg, 1996
2Onate S Idelsohn, O. C. Zienkiewicz,R L Taloy. Afinitepoint method in computation almechanics Application to convective transport and fluidflow [J]. International Journal for Numerical Methodsin Engineering,1996 (10)