Tangential Decomposition. - A. Buzdin (Computing, 1998)

Two-frequency decomposition. - A. Buzdin; Gabriel Wittum (Numerische Mathematik, 2004)

IBLU decompositions based on Padé approximants. - A. Buzdin; Dmitriy Logashenko; Gabriel Wittum (Numer. Linear Algebra Appl., 2008)