G. Birman

The hyperbolic derivative in the Poincaré ball model of hyperbolic geometry

A. Ungar, G. Birman, 2001 .

Cylindrically symmetric spinning Brans-Dicke space-times with closed timelike curves

G. Birman, L. Anchordoqui, S. Bergliaffa, 1998, gr-qc/9804074.

Trigonometry in Lorentzian Geometry

K. Nomizu, G. Birman, 1984 .

The Gauss-Bonnet theorem for $2$-dimensional spacetimes.

K. Nomizu, G. Birman, 1984 .

Variable rest masses in 5-dimensional gravitation confronted with experimental data

G. Birman, L. Anchordoqui, S. Bergliaffa, 1995, gr-qc/9509019.