A friend in need is a friend indeed [software metrics and friend functions].

Michael English Jim Buckley Tony Cahill A friend in need is a friend indeed [software metrics and friend functions]. 469-478 2005 conf/isese/2005 ISESE http://dx.doi.org/10.1109/ISESE.2005.1541854 db/conf/isese/isese2005.html#EnglishBC05