@Article{ MARTINEZ_VILLENA:201-212,

author = { FERNANDO MARTINEZ ALVAREZ and ARMANDO REYES VILLENA MUÑOZ } ,

title = { RANDOM COMMUTATION },

journal = { INDIAN ACADEMY OF SCIENCES. PROCEEDINGS. MATHEMATICAL SCIENCES },

year = { 1997 },

volume = { 107 },

issn = { 0253-4142 },

pages = { 201-212 },

}