Some publications

Excursion and return times of a geodesics to a subset of a hyperbolic Riemann surface, Proc. Amer. Math. Soc. 141 (2013), 3957-3967

Sequences and dynamical systems associated with canonical approximation by rationals, Acta Arith. 154 (2012), 371-384.

Geodesic excursions into an embedded disc on a hyperbolic Riemann surface, Conform. Geom. Dyn. 13 (2009), 1--5.

Geodesic cusp excursions and metric diophantine approximation, Math. Res. Lett. 16 (2009), 67--85.

The relative growth rate for partial quotients, New York J. Math. 14 (2008) 139–143.

The geometry at infinity of a hyperbolic Riemann surface of infinite type, (with P.D.Susskind) Geome. Dedicata, Volume 130, No. 1 (2007), 1-24.

The distribution of geodesic excursions into the neighborhood of a cone singularity on a hyperbolic 2-orbifold, Comment. Math. Helv., Volume 83 (2008), 1-20

The distribution of geodesic excursions out the end of a hyperbolic orbifold and approximation with respect to a Fuchsian group., Geom. Dedicata, Volume 116, No. 1 (2005), 129-155

An ergodic sum related to the approximation by continued fractions,, N.Y.J. Math., Volume 11 (2005), 345-350

The distribution of Jager pairs for continued fraction like mappings of the interval, (with D. Molnar), Pacific J. of Math., Volume 217, No. 1 (2004), 101-114.

Metrical diophantine approximation for continued fraction like maps of the interval,(with D. Molnar) Trans. Amer. Math. Soc. 356 (2004), 2851-2870.