Works citing   [Lett. Math. Phys. 105 (2015), 939-958]

1. D. Barseghyan and A. Khrabustovskyi:
   Spectral estimates for Dirichlet Laplacian on tubes with exploding twisting velocity,
   Oper. Matrices 13 (2019), 311-322.
   
   
2. V. Bruneau, P. Miranda, D. Parra and N. Popoff:
   Eigenvalue and Resonance Asymptotics in Perturbed Periodically Twisted Tubes: Twisting Versus Bending,
   Ann. H. Poincare 21 (2020) 377-403.