Media type: E-Article Title: Implementation and Application of Automata: Unary Language Concatenation and Its State Complexity Contributor: Pighizzini, Giovanni imprint: Springer Berlin Heidelberg, 2001 Published in: Implementation and Application of Automata Language: Not determined DOI: 10.1007/3-540-44674-5_21 ISSN: 0302-9743 Origination: Footnote: