This is probably unsatisfying, but it's where I read about it: http://www.demarcken.org/carl/papers/ITA-software-travel-complexity/img22.html http://www.demarc

This is probably unsatisfying, but it's where I read about it: http://www.demarcken.org/carl/papers/ITA-software-travel-complexity/img22.html http://www.demarcken.org/carl/papers/ITA-software-travel-com... ToC: http://www.demarcken.org/carl/papers/ITA-software-travel-complexity/ITA-software-travel-complexity.html http://www.demarcken.org/carl/papers/ITA-software-travel-com... You could email the author and ask him, he seems to know.