- Author: Ivar Ekeland
- Language: french
- Year: 2015
- Author: Ivar Ekeland
- Language: Italian
- Year: 2021
- Author: Ivar Ekeland
- Language: Spanish
- Year: 2011
El Caos
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- Author: Ivar Ekeland
- Language: Spanish
- Year: 2016
- Author: Ivar Ekeland
- Language: English
- Year: 2011
- Author: Ekeland Ivar
- Language: Italian
- Year: 1992
- Author: Обен Ж.-П. Экланд И. (Aubin J.-P. Ekeland I.)
- Language: Русский
- Year: 1988
- Author: Ivar Ekeland Thomas Turnbull
- Language: English
- Year: 1983
- Author: Jean-Pierre Aubin Ivar Ekeland
- Language: English
- Year: 1984