@unpublished{mahouton:hal-03557517, TITLE = {{Extremum conditions for functionals involving higher derivatives of several variable vector valued functions}}, AUTHOR = {Mahouton, Norbert and Sielenou, Pascal Dkengne}, URL = {https://inria.hal.science/hal-03557517}, NOTE = {working paper or preprint}, YEAR = {2022}, MONTH = Feb, KEYWORDS = {Variational problems ; critical points ; extremum conditions}, PDF = {https://inria.hal.science/hal-03557517/file/cipma-paper-extrema-conditions.pdf}, HAL_ID = {hal-03557517}, HAL_VERSION = {v1}, }