4 http://hdl.handle.net/10338.dmlcz/135666 4 News. The importance and contribution of cybernetics for contemporary information society http://hdl.handle.net/10338.dmlcz/135676 News. The importance and contribution of cybernetics for contemporary information society Book reviews http://hdl.handle.net/10338.dmlcz/135675 Book reviews The color-balanced spanning tree problem http://hdl.handle.net/10338.dmlcz/135674 The color-balanced spanning tree problem Self-reproducing pushdown transducers http://hdl.handle.net/10338.dmlcz/135673 Self-reproducing pushdown transducers