@incollection{Pommaret12, author = {J.F. Pommaret}, title = {Spencer Operator and Applications: From Continuum Mechanics to Mathematical Physics"}, booktitle = {Continuum Mechanics}, publisher = {IntechOpen}, address = {Rijeka}, year = {2012}, editor = {Yong X. Gan}, chapter = {1}, doi = {10.5772/35607}, url = {https://doi.org/10.5772/35607} }