O. L. Semenova, “On the porosity of the limit set and the boundedness of the oscillation of the function $\log(\operatorname{dist}(X,\Lambda))$ in the case of a Fucshian group without parabolic elements”, Zap. Nauchn. Sem. POMI, 262 (1999), 214–222; J. Math. Sci. (New York), 110:5 (2002), 3022–3026
1998
2.
O. L. Semenova, “A property of purely hyperbolic Fuchsian groups of the second kind”, Zap. Nauchn. Sem. POMI, 255 (1998), 177–183; J. Math. Sci. (New York), 107:4 (2001), 4092–4096