@Article{ VILLENA:175-179,

author = { ARMANDO REYES VILLENA MUÑOZ } ,

title = { ESSENTIALLY DEFINED DERIVATIONS ON SEMISIMPLE BANACH ALGEBRAS },

journal = { PROCEEDINGS OF THE EDINBURGH MATHEMATICAL SOCIETY },

year = { 1997 },

volume = { 40 },

issn = { 0013-0915 },

pages = { 175-179 },

}