Herschel Planetary Nebula Survey (HerPlaNS)★: hydrogen recombination laser lines in Mz 3 - Aleman, Isabel; Exter, Katrina; Ueta, Tetsushi; Walton, Samuel; Tielens, A G G M; Zijlstra, Albert; Montez Jr., Rodolfo; Abraham, Zulema; Otsuka, Masaaki; Beaklini, Pedro Paulo Bonetti; Van Hoof, Peter A. M; Villaver, Eva; et al. (Monthly Notices of the Royal Astronomical Society, 2018)