III Gagola Stephen M.: Subloops of the unit octonions. In: Acta scientiarum mathematicarum, (72) 3-4. pp. 837-861. (2006)
III Gagola Stephen M. and Hall Jonathan I.: Lagrange's Theorem for Moufang loops. In: Acta scientiarum mathematicarum, (71) 1-2. pp. 45-64. (2005)