B.R. Stella and H.-J. Meyer (2011). "Υ(9.46 GeV) and the gluon discovery (a critical recollection of PLUTO results)". European Physical Journal H36 (2): 203–243. doi:10.1140/epjh/e2011-10029-3. Bibcode: 2011EPJH...36..203S.
B.R. Stella and H.-J. Meyer (2011). "Υ(9.46 GeV) and the gluon discovery (a critical recollection of PLUTO results)". European Physical Journal H36 (2): 203–243. doi:10.1140/epjh/e2011-10029-3. Bibcode: 2011EPJH...36..203S.