(290) Julio Becerra Guerrero - Maria Burgos - El Amin Kaidi - Angel Rodriguez Palacios, Banach spaces whose algebras of operators have a large group of unitary elements, Math. Proc. Cambridge Philos. Soc. 144, No.1, 97-108 (2008).

(291) Ginés López Pérez, The big slice phenomena in M-embedded and L-embedded spaces, Proc. Am. Math. Soc. 134, No.1, 273-282 (2006).

(292) J. Becerra Guerrero - Miguel Martin, The Daugavet property of C*-algebras, JB*-triples and of their isometric preduals, J. Funct. Anal. 224, No.2, 316-337 (2005).