Carlitz Leonard: Permutations in finite fields. In: Acta scientiarum mathematicarum, (24) 3-4. pp. 196-203. (1963)
Carlitz Leonard: A note on exponential sums : To Professor L. Rédei on his sixtieth birthday. In: Acta scientiarum mathematicarum, (21) 3-4. pp. 135-143. (1960)