About nonassociativity in mathematics and physicsLõhmus, Jaak; Paal, Eugen; Sorgsepp, LeoActa applicandae mathematicae1998 / p. 3-31 https://link.springer.com/article/10.1023/A:1005854831381

Continuous Moufang transformationsPaal, EugenActa applicandae mathematicae1998 / p. 77-91

Some applications of geodesic loops and nonlinear geometric algebra in the theory of gravityKuusk, Piret; Paal, EugenActa applicandae mathematicae1998 / p. 67-76