Factorization by Invariant Embedding of Elliptic Problems in a Circular Domain. - Jacques Henry; Bento Louro; Maria C. Soares (System Modelling and Optimization, 2003)

Factorization by Invariant Embedding of a Boundary Value Problem for the Laplace Operator. - Jacques Henry; Bento Louro; Maria C. Soares (System Modelling and Optimization, 2007)