Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) ENGEL G.,"Continuous/discontinuous finite element approximations of fourth-order elliptic problems in structural and continuum mechanics with applications to thin beams and plates, and strain gradient elasticity",Comput. Methods. Appl. Mech. Engng.,,,2002,191,,3669-3750,https://cir.nii.ac.jp/crid/1570009751822115968,