de Mello, G. F. Porto; da Silva, L. (1991), "On the physical existence of the Zeta HER moving group – A detailed analysis of Phi exp 2 Pavonis", Astronomical Journal, 102: 1816–1825, Bibcode:1991AJ....102.1816P, doi:10.1086/116006
de Mello, G. F. Porto; da Silva, L. (1991), "On the physical existence of the Zeta HER moving group – A detailed analysis of Phi exp 2 Pavonis", Astronomical Journal, 102: 1816–1825, Bibcode:1991AJ....102.1816P, doi:10.1086/116006