Sources

Carl Friedrich Gauss

Britannica
HGSS
Mac Tutor

Georg Cantor

Famous Mathematicians
Documentary Films
Futura Sciences

Ettore Majorana

Il Secondo Mestiere
Terremarsicane
Forbes

Kurt Gödel

Stanford Encyclopedia of Philosophy
Top Documentary Films
MATEpristem

Theodore Kaczynski

Der Spiegel
Britannica
Wikiquote

Fulvia Skof

Research Gate
Zentralblatt MATH
Math Scinet