Injectivity Sets for Spherical Means on the Heisenberg Group. Mark L. Agranovsky; Rama Rawat — 1999 The journal of Fourier analysis and applications [[Elektronische Ressource]]
Geometry of stationary sets for the wave equation in ℝ n . The case of finitely supported initial data: An announcement. Agranovsky, Mark L.; Quinto, Eric Todd — 2001 Southwest Journal of Pure and Applied Mathematics [electronic only]