@inbook{12474, author = {Robert Kirby and Anders Logg}, title = {Finite Element Variational Forms}, year = {2012}, journal = {Automated Solution of Differential Equations by the Finite Element Method}, volume = {84}, chapter = {5}, pages = {129-136}, publisher = {Springer}, isbn = {978-3-642-23098-1}, editor = {Anders Logg and Kent-Andre Mardal and Garth Wells}, }