1. Allen, G.P. 2006. An automated pollen recognition system. Master's thesis. New Zealand: Massey University. Available online at http://mro.massey.ac.nz/.
2. Machine vision for automated optical recognition and classification of pollen grains or other singulated microscopic images;Allen,2008
3. Towards a climate event stratigraphy for New Zealand over the past 30,000years (NZ-INTIMATE project);Alloway;Journal of Quaternary Science,2007
4. Development of a semi-automatic system for pollen recongnition;Boucher;Aerobiologia,2002
5. The distribution of pollen grains on microscope slides. Part 1. The non-randomness of the distribution;Brookes;Pollen et Spores,1967