\Bibitem{Fuc45}
\by B.~Fuchs
\paper Sur la fonction minimale d'un domaine.~I
\jour Sb. Math.
\yr 1945
\vol 58
\issue 1
\mathnet{http://mi.mathnet.ru/eng/sm6318}
\mathscinet{https://mathscinet.ams.org/mathscinet-getitem?mr=12665}
\zmath{https://zbmath.org/?q=an:0063.01474}