Repetitions in Kolakoski Sequence. - Arto Lepistö (Developments in Language Theory, 1993)

On the Power of Periodic Iteration of Morphisms. - Arto Lepistö (ICALP, 1993)

Comparing Descriptional and Computational Complexity of Infinite Words. - Juraj Hromkovic; Juhani Karhumäki; Arto Lepistö (Results and Trends in Theoretical Computer Science, 1994)

On the Computational Complexity of Infinite Words. - Arto Lepistö (Developments in Language Theory, 1995)

Locally Periodic Infinite Words and a Chaotic Behaviour. - Juhani Karhumäki; Arto Lepistö; Wojciech Plandowski (ICALP, 1998)

Relations between Local and Global Periodicity of Words. - Arto Lepistö (ICALP, 1999)

Locally Periodic Versus Globally Periodic Infinite Words. - Juhani Karhumäki; Arto Lepistö; Wojciech Plandowski (J. Comb. Theory A, 2002)

A characterization of periodicity of bi-infinite words. - Tero Harju; Arto Lepistö; Dirk Nowotka (Theor. Comput. Sci., 2005)

Transposition invariant words. - Arto Lepistö; Francesco Pappalardi; Kalle Saari (Theor. Comput. Sci., 2007)