Roger, 1863b PDF: 16, 21 (catalogue);
Mayr, 1863a PDF: 451, 455 (catalogue);
Mayr, 1865 PDF: 12 (
Sysphingta,
Proceratium diagnoses);
Cresson, 1887 PDF: 258 (U.S.A. catalogue);
Dalla Torre, 1893 PDF: 18 (catalogue);
Emery, 1911e PDF: 50 (diagnosis, catalogue);
Emery, 1911e PDF: 50 (
Sysphingta diagnosis, catalogue);
Arnold, 1915: 34 (
Sysphingta diagnosis);
Emery, 1916a PDF: 103 (Italy species key);
Wheeler, 1922: 761 (Afrotropical catalogue);
Kratochvíl et al., 1944 PDF: 58, 88 (West Palaearctic species key);
Creighton, 1950a PDF: 39, 41 (North America
Proceratium,
Sysphingta species keys);
Chapman & Capco, 1951 PDF: 77 (Asia
Proceratium,
Sysphingta checklists);
Brown, 1958g PDF: 241 (review of genus);
Bernard, 1967a PDF: 81 (diagnosis);
Snelling, 1967 PDF: 8 (New World species key);
Kempf, 1972b PDF: 211 (Neotropical catalogue);
Brown, 1974a PDF: 81 (species notes);
Baroni Urbani, 1977d PDF: 91 (European species, synopsis);
Smith, 1979: 1338 (North America catalogue);
Brown, 1980c PDF: 342 (New World species key);
Terron, 1981 PDF: 102 (Afrotropical species notes);
Taylor & Brown, 1985: 39 (Australia catalogue);
Taylor, 1987a PDF: 65 (Australia checklist);
Agosti & Collingwood, 1987b PDF: 264 (Balkans species key);
Ward, 1988 PDF: 116 (New World species key);
Morisita et al., 1989: 14 (Japan species key);
Brandão, 1991 PDF: 373 (Neotropical catalogue);
Lattke, 1994 PDF: 113 (phylogeny);
Bolton, 1995a PDF: 1052 (census);
Bolton, 1995b: 366 (catalogue);
Shattuck, 1999: 203 (Australia synopsis);
Xu, 2000c PDF: 434 (China species key);
Onoyama & Yoshimura, 2002 PDF: 31 (Japan species key);
Bolton, 2003 PDF: 179 (synopsis);
Baroni Urbani & de Andrade, 2003a PDF: 40 (diagnosis, all species revision, keys; Palaearctic species key: 445; Indomalayan species key: 447; Oceanean species key: 449; Afrotropical species key: 451; Nearctic and Neotropical species key: 452; world species key: 456);
Xu, 2006 PDF: 153 (China species key);
Sosa-Calvo & Longino, 2008 PDF: 228 (Neotropical species key);
Yoshimura & Fisher, 2009 PDF: 13 (Malagasy males diagnosis);
Terayama, 2009 PDF: 97 (Taiwan species key);
Sarnat & Economo, 2012 PDF: 166 (Fiji species key);
Hita Garcia et al., 2014 PDF (Afrotropical clade key: 53;
Proceratium arnoldi clade revision, Afrotropical species key: 55);
Hita Garcia et al., 2015 PDF: 101 (Fiji revision, species key);
Dlussky et al., 2015 PDF: 143 (diagnosis for impression fossils);
Liu et al., 2015 10.3897/JHR.46.5849 PDF: 35 (Somoa revision, Oceanic island species key);
Cantone, 2017 PDF: 276 (brief male diagnosis);
Staab et al., 2018 10.3897/zookeys.770.24908 PDF: 144 (Chinese species);
Fernandes et al., 2019 10.13102/sociobiology.v66i4.4484 PDF: 556 (P. micrommatum clade species key);
Escárraga et al., 2019 PDF: 688 (Colombia species key);
Sadasivan & Kripakaran, 2022 10.11609/jott.7682.14.7.21368-21387 PDF: 21371 (
Proceratium stictum species group worker description), 21376 (modified key to Indo-Malayan species (workers));
Borowiec & Salata, 2022 PDF: 16 (diagnosis), 17 (key to Greece species).