On the Capabilities of Alternating and Nondeterministic Multitape Automata. - Dainis Geidmanis (FCT, 1987)

On Possibilities of One-Way Synchronized and Alternating Automata. - Dainis Geidmanis (MFCS, 1990)

Tally Languages Accepted by Alternating Multitape Finite Automata. - Dainis Geidmanis; Janis Kaneps; Kalvis Apsitis; Daina Taimina; Elena Calude (COCOON, 1997)

Tally Languages Accepted by Monte Carlo Pushdown Automata. - Janis Kaneps; Dainis Geidmanis; Rusins Freivalds (RANDOM, 1997)