1. Systèmes de triplets et différences associées;Bermond,1976
2. Irregularity strength of full d-ary trees;Cammack,1991
3. Irregular networks;Chartrand,1988
4. Facts and quests on degree irregular assignments;Lehel,1991
5. On certain distributions of integers in pairs with given differences;Skolem;Math. Scand.,1957