Linked from
The 7 pages that link to Electron neutrino, each with the reason it gives.
MuonCompared with: Muon decay produces an electron antineutrino, not an electron neutrino.
Electron captureRelated: Electron capture emits this particle to conserve lepton number and energy.
Muon decayRelated: Muon decay produces its antiparticle alongside the electron.
Homestake experimentBroader topic: The chlorine reaction in Homestake was sensitive to this flavor.
Beta particleRelated: It shares energy and momentum in positron-producing beta decay.