@Article{ MARTINEZ_MENA_PAYÁ_RODRIGUEZ:609-626,

author = { JUAN MARTINEZ MORENO and JUAN FRANCISCO MENA JURADO and RAFAEL PAYÁ ALBERT and ANGEL RODRIGUEZ PALACIOS } ,

title = { AN APPROACH TO NUMERICAL RANGES WITHOUT BANACH ALGEBRA THEORY },

journal = { ILLINOIS JOURNAL OF MATHEMATICS },

year = { 1985 },

volume = { 29 },

issn = { 0019-2082 },

pages = { 609-626 },

}