- Schaeffer, C. F. A. 1908. New Rhynchophora. 3 [Scolytidae, p. 220-222]. New York Entomological Society, Journal 16:213-222.
- Schaeffer, J. C. 1766. Elementa entomologica; 135 tabulae aere excusae floridisque coloribus distinctae. (Plate CXII). Gedruckt mit weissischen Ragensburg. 4 + 135 p.
- Schaeffer, J. C. 1779. Icones Insectorum circa Ratisbonam Indigenorum Coloribus naturam referentibus expressae. Vol. III. Naturlich ausgemahlte Abbildungen Regensischer Insecten. Dritterund letzter Rand. (Scolytus primus, Erster Kolbenkafer). Ratisbone, Tabula CCLIX, figs. IIIa, IIIb.
- Schaeffer, W. H. 1954. A harvesting technique for beetle-killed Engelmann spruce on the western slope of Colorado . Journal of Forestry 52:860-862.