\bibitem[KNOPPIX/Math 2011]{knoppix/math2011} The KNOPPIX/Math developing team, \emph{{KNOPPIX}/{Math} {2011} {J}apanese edition}, 2011, {\tt knoppix_v6.4.4-math-dvd-20110303-ja.iso}, {\tt http://www.knoppix-math.org/}.
@misc{KNOPPIX/Math 2011, Key = {knoppix/math2011}, Author = {The KNOPPIX/Math developing team}, Title = {{KNOPPIX}/{Math} {2011} {J}apanese edition}, Howpublished = {{\tt knoppix_v6.4.4-math-dvd-20110303-ja.iso}, {\tt http://www.knoppix-math.org/}}, Year = 2011 }