Sagan, H. (1989). Boundary and eigenvalue problems in mathematical physics. New York: Dover Publications.
Παραπομπή Chicago StyleSagan, Hans. Boundary and Eigenvalue Problems in Mathematical Physics. New York: Dover Publications, 1989.
Παραπομπή MLASagan, Hans. Boundary and Eigenvalue Problems in Mathematical Physics. New York: Dover Publications, 1989.
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