2 citations to https://www.mathnet.ru/rus/sm9160

1. S. A. Nazarov, “The essence of “black holes” for elastic waves in solids with cuspidal sharpening”, Dokl. Phys., 66:6 (2021), 182–185    
2. S. A. Nazarov, “Abnormal Behavior of Eigenvalues of Mixed Boundary Value Problems for the Laplace Operator in Truncated, but Long Cylinders”, J Math Sci, 250:2 (2020), 351