[1] [CITE[Throwable - search.cpan.org]]
([TIME[2017-07-17 12:10:45 +09:00]])
<http://search.cpan.org/dist/Throwable/lib/Throwable.pm>

[2] [CITE[Throwable::SugarFactory - search.cpan.org]]
([TIME[2017-07-17 12:34:53 +09:00]])
<http://search.cpan.org/dist/Throwable-SugarFactory/lib/Throwable/SugarFactory.pm>

[3] [CITE@en[wchristian/Throwable-SugarFactory]]
([TIME[2017-07-17 12:36:03 +09:00]])
<https://github.com/wchristian/Throwable-SugarFactory>