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]