An implementation of a divide and conquer algorithm for the unitary eigen problem. - Greg S. Ammar; Lothar Reichel; Danny C. Sorensen (ACM Trans. Math. Softw., 1992)

Corrigendum: Algorithm 730; An implementation of a divide and conquer algorithm for the unitary eigenproblem. - Greg S. Ammar; Lothar Reichel; Danny C. Sorensen (ACM Trans. Math. Softw., 1994)

Dedication to William B. Gragg on the Occasion of his 70th Birthday. - Greg S. Ammar; Lothar Reichel; Marc Van Barel (J. Comput. Appl. Math., 2010)