1. Calenoff, E., Beigler, M. A., Friesen, G. L., & Nichols, J. L. (1990). U.S. patent no. 4,963,356 (pp. 1–30). Washington, DC: U.S. Patent and Trademark Office.
2. Choi, S. H., Jung, I. Y., Kim, D. Y., Kim, Y. H., Lee, J. H., Oh, I. B., & Choi, K. R. (2011). Seasonal distribution of airborne pollen in Ulsan, Korea in 2009-2010. Journal of Ecology and Field Biology, 34(4), 371–379.
3. Choi, S. W., Lee, J. H., Kim, Y. H., Oh, I. B., & Choi, K. R. (2014). Association between the sensitization rate for inhalant allergens in patients with respiratory allergies and the pollen concentration in Ulsan, Korea. The Korean Journal of Medicine, 86(4), 453–461.
4. Cornford, C. A., Fountain, D. W., & Burr, R. G. (1990). lgE-binding proteins from pine (Pinus radiata D. Don) pollen: evidence for cross- reactivity with ryegrass (Lolium perenne). International Archives of Allergy and Immunology, 93, 41–46.
5. Cornford, C. A., Fountain, D. W., Burr, R. G., & O’leary, L. (1988). Hayfever in university students (letter). The New Zealand Medical Journal, 101, 520.