Mary Elisabeth Lehman Lehman, M. E., & Blum, U. (1999). Evaluation of ferulic acid uptake as a measurement of allelochemical dose: Effective concentration. Journal of Chemical Ecology, 25(11), 2589–2600. Blum, U., Shafer, S. R., & Lehman, M. E. (1999). Evidence for inhibitory allelopathic interactions involving phenolic acids in field soils: Concepts vs. an experimental model. Critical Reviews in Plant Sciences, 18(5), 673–693. https://doi.org/10.1080/07352689991309441 Lehman, M. E., & Blum, U. (1999). Influence of pretreatment stresses on inhibitory effects of ferulic acid, an allelopathic phenolic acid. JOURNAL OF CHEMICAL ECOLOGY, 25(7), 1517–1529. https://doi.org/10.1023/A:1020828630638 Lehman, M. E., & Blum, U. (1997). Cover crop debris effects on weed emergence as modified by environmental factors. Allelopathy Journal, 4(1997), 69–88. Blum, U., King, L. D., Gerig, T. M., Lehman, M. E., & Worsham, A. D. (1997). Effects of clover and small grain cover crops and tillage techniques on seedling emergence of dicotyledonous weed species. American Journal of Alternative Agriculture, 12(4), 146–161. https://doi.org/10.1017/s0889189300007487 LEHMAN, M. E., BLUM, U., & GERIG, T. M. (1994). SIMULTANEOUS EFFECTS OF FERULIC AND P-COUMARIC ACIDS ON CUCUMBER LEAF EXPANSION IN SPLIT-ROOT EXPERIMENTS. JOURNAL OF CHEMICAL ECOLOGY, 20(7), 1773–1782. https://doi.org/10.1007/BF02059898