1. M.A. Kaashoek and M.P.A. vandeVen, A linearization for operator polynomials with coefficients in certain operator ideals, Ann. Mat. Pura appl., IV, Vol. CXXV, (1980), pp.329?336.
2. Translations of mathematical monographs;I.C. Gohberg,1968
3. I.C. Gohberg and A.S. Markus, Some relations between eigenvalues and matrix elements of linear operators, Mat. Sb. 64 (106) (1964), 481?496; English transl., Amer. Math. Soc. Transl. (2) 52 (1966), 201?216. MR30 # 457.
4. N.A. Kulesko and Ju.A. Palant, On a theorem of E.I. Sigal about the trace of an operator bundle, Mat. Issled 6, vyp 2 (1971), pp. 150?152 (Russian).
5. A.V. Laginestra and W.E. Boyce, Convergence and evaluation of reciprocal powers of eigenvalues of certain compact operators (on Hilbert space) which are meromorphic functions of the eigenvalue parameter, Ann. Mat. Pura appl., IV ser., 111 (1976), pp. 229?305.