1. Integrable Birkhoff billiards;Bolotin;Vestnik Moskov. Univ. Ser. I Mat. Mekh.,1990
2. Integrable billiards on surfaces of constant curvature;Bolotin;Mat. Zametki,1992
3. On algebraically integrable outer billiards;Tabachnikov;Pacific J. Math.,2008
4. M. Bialy, A.E. Mironov, Angular Billiard and Algebraic Birkhoff conjecture, 2015. arXiv:1601.03196.
5. Integrable mappings;Veselov;Uspekhi Mat. Nauk,1991