PINGU: A vision for neutrino and particle physics at the South Pole - Aartsen, M. G.; Abraham, K.; Ackermann, M.; Adams, J.; Aguilar, J. A.; Ahlers, M.; Ahrens, M.; Altmann, D.; Andeen, K.; Anderson, T.; Ansseau, I.; Anton, G.; et al. (Journal of Physics G: Nuclear and Particle Physics, 2017)