\Bibitem{Tar52} \by V.~A.~Tartakovskii \paper On primitive composition \jour Sb. Math. \yr 1952 \vol 72 \issue 1 \mathnet{http://mi.mathnet.ru//eng/sm5411} \mathscinet{http://mathscinet.ams.org/mathscinet-getitem?mr=47045} \zmath{https://zbmath.org/?q=an:0047.25702}