Works citing   [Adv. Calc. Var. 10 (2017), 357-380]

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   A Sharp estimate for the first Robin-Laplacian eigenvalue with negative boundary parameter,
   Rend Lincei-Mat Appl. 30 (2019), 665-676.
   
   
2. G. Paoli and L. Trani:
   Two Estimates for the First Robin Eigenvalue of the Finsler Laplacian with Negative Boundary Parameter,
   J. Optim. Theory Appl. 181 (2019), 743-757.
   
   
3. V. Lotoreichik:
   Spectral isoperimetric inequalities for singular interactions on open arcs,
   Applicable Analysis 98 (2019), 1451-1460.
   
   
4. D. Bucur and A. Giacomini:
   Minimization of the k-th eigenvalue of the Robin-Laplacian,
   J. Funct. Anal. 277 (2019), 643-687.
   
   
5. P. Exner:
   An optimization problem for finite point interaction families,
   J. Phys. A: Math. Theor. 52 (2019), 405302.
   
   
6. R. S. Laugesen:
   The Robin Laplacian-Spectral conjectures, rectangular theorems,
   J. Math. Phys. 60 (2019), 121507.
   
   
7. A. Savo:
   Optimal eigenvalue estimates for the Robin Laplacian on Riemannian manifolds,
   J. Differential Equations 268 (2020), 2280-2308.
   
   
8. A. V. Vikulova:
   Parallel coordinates in three dimensions and sharp spectral isoperimetric inequalities,
   Ricerche di Matematica (2020) .
   
   
9. D. Barseghyan and P. Exner:
   Spectral geometry in a rotating frame: Properties of the ground state,
   J. Math. Anal. Appl. 489 (2020) 124130.
   
   
10. F. D. Pietra and G. Piscitelli:
    An Optimal Bound for Nonlinear Eigenvalues and Torsional Rigidity on Domains with Holes,
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