https://inducks.org/story.php?c=H+2012-071
https://inducks.org/story.php?c=H+2015-147
https://inducks.org/story.php?c=H+2012-201
https://inducks.org/story.php?c=H+2018-039
H2018-031 'Een weekje... patenten'. Willie Wortel gaat de hele week naar het patentenbureau. Door Carlo Gentina. Nog niet op Inducks.
https://inducks.org/story.php?c=D+2016-013
https://inducks.org/story.php?c=H+2018-040
https://inducks.org/story.php?c=D+2016-006
https://inducks.org/story.php?c=H+2018-084