V. Takhistov et al. (The Super-Kamiokande Collaboration),
“Search for Nucleon and DiNucleon Decays with an Invisible Particle and a Charged Lepton in the Final State at the Super-Kamiokande Experiment”,
Journal reference: Phys. Rev. Lett. 115, 121803 (http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.115.121803),
e-Print: ArXiv: 1508.05530[hep-ex]