1. Bernini, A., Bilotta, S., Pinzani, R., Vajnovszki, V.: Two Gray codes for $$q$$ q -ary $$k$$ k -generalized Fibonacci strings. In: ICTCS13, Palermo-Italy, 9–11 Sept (2013)
2. Bilotta, S., Pergola, E., Pinzani, R.: A construction for a class of binary words avoiding $$1^j0^i$$ 1 j 0 i . Pu.M.A 23(2), 81–102 (2012)
3. Bilotta, S., Merlini, D., Pergola, E., Pinzani, R.: Pattern $$1^{j+1}0^j$$ 1 j + 1 0 j avoiding binary words. Fund. Inf. 117, 35–55 (2012)
4. Er, M.C.: On generating the $$N$$ N -ary reflected Gray code. IEEE Trans. Comput. 33(8), 739–741 (1984)
5. Gray, F.: Pulse code communication. US Patent 2632058 (1953)