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Johnson BJ, Happ CM, Mayer LW, Piesman J.Johnson BJ, et al. Among authors: happ cm.Am J Trop Med Hyg. 1992 Dec;47(6):730-41. doi: 10.4269/ajtmh.1992.47.730.Am J Trop Med Hyg. 1992.PMID: 1471733
Anderson BE, Sims KG, Olson JG, Childs JE, Piesman JF, Happ CM, Maupin GO, Johnson BJ.Anderson BE, et al. Among authors: happ cm.Am J Trop Med Hyg. 1993 Aug;49(2):239-44. doi: 10.4269/ajtmh.1993.49.239.Am J Trop Med Hyg. 1993.PMID: 8357086
Piesman J, Clark KL, Dolan MC, Happ CM, Burkot TR.Piesman J, et al. Among authors: happ cm.J Vector Ecol. 1999 Jun;24(1):91-8.J Vector Ecol. 1999.PMID: 10436883