@article{{MRA}{}, author = {Petkov, P.}, title = { Omicron Waves in Few European Countries till June 2022 Modeled by a New Version of a Tracking Approach with Successive and Superimposed Waves}, journal = {Medical Research Archives}, volume = {11}, number = {7.1}, year = {2023}, doi = {10.18103/mra.v11i7.1.4080}, url = {https://esmed.org/MRA/mra/article/view/4080} }