The following publications are possibly variants of this publication:
- Pairs of Complementary Unary Languages with "Balanced" Nondeterministic AutomataViliam Geffert, Giovanni Pighizzini. algorithmica, 63(3):571-587, 2012. [doi]
- Complementing unary nondeterministic automataFilippo Mera, Giovanni Pighizzini. TCS, 330(2):349-360, 2005. [doi]
- Complementing Unary Nondeterministic AutomataFilippo Mera, Giovanni Pighizzini. dcfs 2003: 174-185
- On the Size of Unary Probabilistic and Nondeterministic AutomataMaria Paola Bianchi, Carlo Mereghetti, Beatrice Palano, Giovanni Pighizzini. FUIN, 112(2-3):119-135, 2011. [doi]
- Probabilistic vs. Nondeterministic Unary AutomataMaria Paola Bianchi, Carlo Mereghetti, Beatrice Palano, Giovanni Pighizzini. ncma 2010: 33-44