2 http://hdl.handle.net/10338.dmlcz/106992 2 Phase and dispersion theory of the differential equation $y''=q(t)y$ in connection with the generalized Floquet theory http://hdl.handle.net/10338.dmlcz/106997 Phase and dispersion theory of the differential equation $y''=q(t)y$ in connection with the generalized Floquet theory Homomorphisms of machines. II http://hdl.handle.net/10338.dmlcz/106996 Homomorphisms of machines. II Characterizations of certain monounary algebras. I http://hdl.handle.net/10338.dmlcz/106995 Characterizations of certain monounary algebras. I On asymptotic integrations of $x^2y''-P(x)y=0$ http://hdl.handle.net/10338.dmlcz/106994 On asymptotic integrations of $x^2y''-P(x)y=0$