[en] In contrast to the predictions of the Standard Model of particle physics, experimental data now indicate that neutrinos are massive and undergo flavor oscillations. Indeed, observations of atmospheric neutrinos have confirmed that the disappearance of high-energy muon-like events is well described by the conversion of ν_μ into ν_τ. Though the primary atmospheric neutrino flux at these energies is composed almost exclusively of ν_e and ν_μ, this transition implies that it is also possible to observe ν_τ-induced events. Recent results from the Super-Kamiokande ν_μ disappearance analysis as well the search for the subsequent appearance of ν_τ events in the data are presented.