[1]
Huang, S.-Z., Render, H. and Wolff, M.P.H. 1999. On the convergence of sequences of operators and the convergence of the sequence of their spectra. MATHEMATICA SCANDINAVICA. 85, 1 (Sep. 1999), 71–78. DOI:https://doi.org/10.7146/math.scand.a-13885.