Esther Meerim Lee Kim, C. K., Oh, S. D., Rhee, J. I., Lee, E. M., & Yoon, T. R. (2010). Expression and purification of recombinant human bone morphogenetic protein-7 (rhBMP-7) in Bacillus subtilis. Biotechnology and Bioprocess Engineering, 15(5), 830–836. Higham, A. K., Tang, C., Landry, A. M., Pridgeon, M. C., Lee, E. M., Andrady, A. L., & Khan, S. A. Foam electrospinning: A multiple jet, needle-less process for nanofiber production. AIChE Journal, 60(4), 1355–1364.