Quadrupole lenses on the basis of permanent magnets for a PRIOR proton microscope prototype. - Kantsyrev, A.; Skachkov, Vl.; Panyushkin, V.; Golubev, A.; Bogdanov, A.; Bakhmutova, A.; Ladygina, E.; Markov, N.; Sergeeva, O.; Skachkov, Vic.; Semennikov, A.; Turtikov, V.; et al. (Instruments & Experimental Techniques, 2016)