Não informado. (1993). Calculus of Variations and Partial Differential Equations. Springer Verlag.
Lua i Stíl Chicago (17ú heag.)Não informado. Calculus of Variations and Partial Differential Equations. Berlin: Springer Verlag, 1993.
Lua MLA (8ú heag.)Não informado. Calculus of Variations and Partial Differential Equations. Springer Verlag, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.