A geometric characterization of Finsler manifolds of constant curvature K = 1 . Bejancu, A.; Farran, H.R. — 2000 International Journal of Mathematics and Mathematical Sciences
On hyperbolic Hermite manifolds. Farran, H.R.; Zanoun, M.S. — 1989 Publications de l'Institut Mathématique. Nouvelle Série
Symmetric models of the real projective plane. Farran, H.R.; Pinto, Maria do Rosario; Robertson, S.A. — 1999 Beiträge zur Algebra und Geometrie
Classical solids. Farran, H.R.; d'Azevedo Breda, A.M.; Robertson, S.A. — 1995 Beiträge zur Algebra und Geometrie