Media type: E-Article Title: Topological lattice defects by groupoid methods and Kasparov’s KK-theory* Contributor: Prodan, Emil imprint: IOP Publishing, 2021 Published in: Journal of Physics A: Mathematical and Theoretical Language: Not determined DOI: 10.1088/1751-8121/ac254a ISSN: 1751-8113; 1751-8121 Keywords: General Physics and Astronomy ; Mathematical Physics ; Modeling and Simulation ; Statistics and Probability ; Statistical and Nonlinear Physics Origination: Footnote: