. . . "Birkh\u00E4user Boston, Ltd." . . "''Birkh\u00E4user Verlag''" . . "Birkh\u00E4user Publishing Ltd" . . . "Birkh\u00E4user Boston" . . . . . . . "Birkh\u00E4user Boston, Inc." . . . . . . . . . . "Birkhauser" . . . "Birkh\u00E4user" . . . . . . . . "1879" . "Birkh\u00E4user Science" . "Birkh\u00E4user" . . . . . . . . . . "Birkh\u00E4user Verlag" . . .