Resonance effects in near-threshold electron-impact excitation of the 143.4 nm line in the Pb+ ion Anna N. Gomonai, Yuriy I. Hutych and Aleksandr I. Gomonai Eur. Phys. J. D, 71 2 (2017) 31 Published online: 14 February 2017 DOI: 10.1140/epjd/e2016-70603-9