@article{RSMUP_2021__145__107_0, author = {Mantegazza, Carlo}, title = {Some elementary questions in the calculus of variations}, journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova}, pages = {107--115}, volume = {145}, year = {2021}, doi = {10.4171/rsmup/73}, mrnumber = {4261648}, zbl = {1467.49001}, language = {en}, url = {http://www.numdam.org/articles/10.4171/rsmup/73/} }