@Article{ ANTOLIN_ZARZO:431-435,

author = { JUAN ANTONIO ANTOLIN COMA and ALEJANDRO ZARZO ALTAREJOS } ,

title = { Rigorous bounds to the atomic ionization potential },

journal = { Journal of Physics B: Atomic, Molecular and Optical Physics },

year = { 1993 },

volume = { 26 },

pages = { 431-435 },

}