...to the Dutch researchers
that Leonard is currently ripping off.
The Big Bang Theory Season 3, Episode 10
I'm employing the work
of Dutch researcher, Mirjam Tuk,
The Big Bang Theory Season 7, Episode 19
why they're called
Pennsylvania Dutch
The Big Bang Theory Season 12, Episode 7
"Dutch" is a bastardization
of the word "Deutsch,"
The Big Bang Theory Season 12, Episode 7