Cita APA (7th ed.)
Hofer, H. H. (1981). A variational approach to a class of resonance problems with application to a wave equation problem.
Cita Chicago (17th ed.)
Hofer, Helmut H.W. A Variational Approach to a Class of Resonance Problems with Application to a Wave Equation Problem. Zürich, 1981.
Cita MLA (9th ed.)
Hofer, Helmut H.W. A Variational Approach to a Class of Resonance Problems with Application to a Wave Equation Problem. 1981.
Atenció: Aquestes cites poden no estar 100% correctes.