Geodesic multiplication and geodesic translations as a generalization of Poincare shiftsKuusk, Piret; Örd, Jüri; Paal, Eugen15th International Conference on General Relativity and Gravitation, Pune, India, 16.-21. December 1997 : abstracts1998 / [1] p

Geodesic multiplication and geometrical BRST-like operatorsKuusk, Piret; Örd, Jüri; Paal, EugenProceedings of the Estonian Academy of Sciences. Physics. Mathematics1995 / 4, p. 437-449

Geodesic multiplication and the theory of gravityKuusk, Piret; Örd, Jüri; Paal, EugenJournal of mathematical physics1994 / 1, p. 321-334

Quantum kinematics of a test particle in a curved spacetimeKuusk, Piret; Örd, Jüri; Paal, EugenClass. Quantum Grav1997 / p. 2917-2926