1. "These de 3-ème Cycle,";R. Douady;Université de Paris 7,1982
2. Unbounded orbits for semicircular outer billiards,;D. Dolyopyat;Annales Henri Poincaré
3. Dual billiards,;F. Dogru;Math. Intelligencer,2005
4. Dual billiards in the hyperbolic plane,;F. Dogru;Nonlinearity,2002
5. "Regular and Chaotic Dynamics of Outer Billiards,";D. Genin;Ph.D. thesis,2005