@Article{ RUIZ_MARTIN-SANCHEZ:218-220,

author = { RICARDO RUIZ VILLAVERDE and MARIA CRUZ MARTIN-SANCHEZ } ,

title = { NODULOS PERLADOS EN HELIX },

journal = { PIEL },

year = { 2002 },

volume = { 17 },

issn = { 0213-9251 },

pages = { 218-220 },

}