Micromotor-mediated sperm constrictions for improved swimming performanceFriedrich Striggow, Lidiia Nadporozhskaia, Benjamin M. Friedrich, Oliver G. Schmidt and Mariana Medina-SánchezEur. Phys. J. E, 44 5 (2021) 67DOI: https://doi.org/10.1140/epje/s10189-021-00050-9