%0 Journal Article %T Shell formation and nuclear masses %A Zuker %A A.P. %J Revista mexicana de f¨Ēsica %D 2008 %I Sociedad Mexicana de F¨Ēsica %X we describe the basic mechanisms responsible for nuclear bulk properties and shell formation incorporated in the duflo zuker models. the emphasis is put on explaining why functionals of the occupancies can be so efficient in accounting for data with minimal computational effort. %K binding energies and masses. %U http://www.scielo.org.mx/scielo.php?script=sci_abstract&pid=S0035-001X2008000900021&lng=en&nrm=iso&tlng=en