@inproceedings{Arbuzova:2020L4, author = "Arbuzova, Elena", title = "{Instabilities in modified theories of gravity}", doi = "10.22323/1.362.0026", booktitle = "Proceedings of Multifrequency Behaviour of High Energy Cosmic Sources - XIII {\textemdash} PoS(MULTIF2019)", year = 2020, volume = "362", pages = "026" }