Citazione APA

Appell, J. (2004). Nonlinear spectral theory. Walter de Gruyter.

Stile di citazione Chicago

Appell, Jurgen. Nonlinear Spectral Theory. New York: Walter de Gruyter, 2004.

Citazione MLA

Appell, Jurgen. Nonlinear Spectral Theory. Walter de Gruyter, 2004.