1405-6666 1405-6666 S1405-66662005000200543 México Mexico 00 06 2005 00 06 2005 10 25 543 558

2000 2 1 1 2-16 2001 2002 Ensenada, BC 1990 2 1 1 33-44 1986 116-24 1991 3 3 3 10-30 NCTM 1989 82 8 8 664-71 1998 3ª 1986 31-44 1982 13 183-201 1993 96 6 6 308-14 1989 36 5 5 25-7 1992