Schuh, R. T. & Polhemus, J. T. (1980). "Analysis of taxonomic congruence among morphological, ecological and biogeographic data sets for the Leptopodomorpha (Hemiptera)". Systematic Biology. 29 (1): 1–26. doi:10.1093/sysbio/29.1.1. ISSN1063-5157.
Schuh, R. T. & Polhemus, J. T. (1980). "Analysis of taxonomic congruence among morphological, ecological and biogeographic data sets for the Leptopodomorpha (Hemiptera)". Systematic Biology. 29 (1): 1–26. doi:10.1093/sysbio/29.1.1. ISSN1063-5157.