Schwarzian derivatives, the Poincaré metric and the kernel function. F.W. Gehring; A.F. Beardon — 1980 Commentarii mathematici Helvetici
The hyperbolic metric of a rectangle. Beardon, A.F. — 2001 Annales Academiae Scientiarum Fennicae. Mathematica
Some remarks on non-discrete Möbius groups. Beardon, A.F. — 1996 Annales Academiae Scientiarum Fennicae. Series A I. Mathematica
Parameterizations of algebraic curves. Beardon, A.F.; Ng, T.W. — 2006 Annales Academiae Scientiarum Fennicae. Mathematica