1. Van Moerbeke, D.Allergic Diseases As A Public Health Problem In Europe; European Allergy White Paper;The UCB Institute of Allergy, 2004.
2. Degradation of Pollen by Phycomycetes
3. Biologic Degradation of Fossil Pollen Grains and Spores
4. Elsik, W. C.Microbiological Degradation of Sporopollenin;Brooks, J., Ed.Academic Press, 1971; pp480–511.
5. Holloway, R.Preservation and experimental diagenesis of the pollen exine. PhD Dissertation.Texas A&M University (Botany),College Station, TX, 1981.