On places of algebraic function fields. A. Prestel, F.-V. Kuhlmann (1984) Journal für die reine und angewandte Mathematik
On the extension of a valuation on a field K to K ( X ) . - II Nicolae Popescu, Constantin Vraciu (1996) Rendiconti del Seminario Matematico della Università di Padova
On the extension of valuations on a field K to K ( X ) . - I Nicolae Popescu, Constantin Vraciu (1992) Rendiconti del Seminario Matematico della Università di Padova
On valuations of nearfields Dalibor Klucký, Libuše Marková (1983) Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica
Ordered fields and sign-changing polynomials. T.M. Viswanathan (1977) Journal für die reine und angewandte Mathematik
Ostrwoski's theorem for Henselian valued skew fields. Peter Draxl (1984) Journal für die reine und angewandte Mathematik