M. I. Karakhanyan, “ON THE SPECTRAL THEOREM FOR A BANACH REPRESENTATION OF A COMPACT GROUP GENERATED BY DELSARTE SHIFTS”, Proc. YSU A: Phys. Math. Sci., vol. 34, no. 1 (192), pp. 20–27, Apr. 2000, doi: 10.46991/PYSUA.2000.34.1.020.