2007-4387 2007-4387 S2007-43872021000100007 10.22201/iij.24487937e.2021.15.16117 USA 00 12 2021 00 12 2021 15 7 28

2011 1992 65 1769 2002 71 627-45 1995 105 677 1992 350-4 1999 2019 1975 18 295-306-308 2004 4 741-2 1989 2 97 2015 2 2011 30 1 1 28-9 1995 2014 1982 254-5 2005 1998 144-5 2006 361-75 2012 45 915 1960 1988 2010 2018 1978 33 65-79 2010 2 64-89 at 81-88 1 117-at 127 2014 9 152-4 2014 9 95-158 1994 325-38 1990 3 3-15 2006 56 439 2009 107 1569 2011 2012 241-57 2009 107 1551 1973 82 950 2016 4