APA
Forster K., Jonas & Langer. (2006). Operator theory in Krein spaces and nonlinear eigenvalue problems. Basel: Birkhauser Verlag.
Chicago
Forster Karl-Heinz, Jonas and Langer. 2006. Operator theory in Krein spaces and nonlinear eigenvalue problems. Basel: Birkhauser Verlag.
Harvard
Forster K., Jonas and Langer. (2006). Operator theory in Krein spaces and nonlinear eigenvalue problems. Basel: Birkhauser Verlag.
MLA
Forster Karl-Heinz, Jonas and Langer. Operator theory in Krein spaces and nonlinear eigenvalue problems. Basel: Birkhauser Verlag. 2006.