Statics and dynamics of point boojums, line and modified Saturn ring topological defects in nematic confined geometryP. V. Dolganov, N. A. Spiridenko and V. K. DolganovEur. Phys. J. E, 46 12 (2023) 121DOI: https://doi.org/10.1140/epje/s10189-023-00387-3