@Article{ Martinez-Moreno_MENA_Payá-Albert_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 },

pages = { 609-626 },

}