On the evidence of high-energy alpha emitters (E ≥ 10.6 MeV) in monazite D. Hirdes, H. Jungclas, T. Lund, D. Molzahn et R. Brandt J. Physique Lett., 40 5 (1979) 97-98 DOI: 10.1051/jphyslet:0197900400509700