TY - BOOK ID - 147796258 TI - Analytic Perturbation Theory for Matrices and Operators AU - Baumgärtel, H., AU - Baumgärtel, Hellmut PY - 1984 SN - 9783112721810 PB - Berlin Boston DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:147796258 AB - ER -