• Fourier quasicrystals with unit masses. 

      Olevskii, Alexander; Ulanovskii, Alexander (Peer reviewed; Journal article, 2020)
      The sum of δ-measures sitting at the points of a discrete set Λ⊂R forms a Fourier quasicrystal if and only if Λ is the zero set of an exponential polynomial with imaginary frequencies.