Dynamic magnetic shield for the CLAS12 central TOF detector photomultiplier tubes - Baturin, V.; Burkert, V.; Carman, D.S.; Elouadrhyri, L.; Grilli, D.; Kashy, D.; Pasyuk, E.; Quettier, L.; Wieland, B. (Nuclear Instruments & Methods in Physics Research Section A, 2012)