1 http://hdl.handle.net/10338.dmlcz/148988 1 On the Mathematical Theory of Records http://hdl.handle.net/10338.dmlcz/148996 On the Mathematical Theory of Records The inverse problem in the calculus of variations: new developments http://hdl.handle.net/10338.dmlcz/148995 The inverse problem in the calculus of variations: new developments A look on some results about Camassa–Holm type equations http://hdl.handle.net/10338.dmlcz/148994 A look on some results about Camassa–Holm type equations Jets and the variational calculus http://hdl.handle.net/10338.dmlcz/148993 Jets and the variational calculus