_id,doi,title
7791,10.1007/s40879-020-00405-0,When different norms lead to same billiard trajectories?
10608,10.1007/s40879-021-00515-3,Coarse infinite-dimensionality of hyperspaces of finite subsets
8538,10.1007/s40879-020-00426-9,Billiards in ellipses revisited
441,10.1007/s40879-018-0218-0,"Tropical formulae for summation over a part of SL(2,Z)"