• Operads for x-physicsPaal, EugenCzechoslovak journal of physics2001 / 12, p. 1407-1413
  • Operads for x-physicsPaal, EugenAbstracts of 10th International Colloquium "Quantum Groups and Integrable Systems" : Prague, 21-23 June, 20012001 / p. 8 https://www.researchgate.net/publication/226036969_Operads_for_x-physics