artículo científico publicado en 1996

artículo científico publicado en 2005

abstract published in 1997

artículo científico publicado en 2002

field study published in 2001

field study published in 2001

field study published in 1994

field study published in 1992

field study published in 1993

field study published in 1995

field study published in 1994

field study published in 1994

field study published in 1993

field study published in 1993

field study published in 1993

field study published in 1993

field study published in 1993

field study published in 1993

field study published in 1995

field study published in 1993

field study published in 1996

field study published in 1995

field study published in 1994

field study published in 1994

field study published in 1997

field study published in 1995

field study published in 1996

field study published in 1996

field study published in 1997

field study published in 1998

field study published in 1998

field study published in 1997

field study published in 2000

field study published in 1999

field study published in 2001

artículo científico publicado en 1995

artículo científico

artículo científico publicado en 1996

artículo científico publicado en 1996

artículo científico publicado el 1 de febrero de 1998

artículo científico publicado en 2006

abstract published in 2000