Adjoints of composition operators on standard Bergman and Dirichlet spaces on the unit disk. Pena, Carlos C. — 2003 Acta Mathematica Academiae Paedagogicae Nyí regyháziensis. New Series [electronic only]
Some remarks about bounded derivations on the Hilbert space of square summable matrices. Barrenechea, Ana L.; Peña, Carlos C. — 2005 Matematichki Vesnik
On uniformly continuous operators and some weight-hyperbolic function Banach algebra. Barrenechea, Ana L.; Peña, Carlos C. — 2006 Sibirskie Ehlektronnye Matematicheskie Izvestiya [electronic only]
On the structure of derivations on certain nonamenable nuclear Banach algebras. Barrenechea, Ana L.; Peña, Carlos C. — 2009 The New York Journal of Mathematics [electronic only]
Solutions of shallow-water equations in non-rectangular cross-section channels. Thomas, Luis P.; Peña, Carlos C.; Barrenechea, Ana Lucia; Marino, Beatriz M. — 2007 Applied Mathematics E-Notes [electronic only]