1. Some useful techniques in the study and interpretation of pollen morphology;Bailey;J. Arnold Arbor.,1960
2. Some functional features during pollen development;Barnes,1986
3. Plant ultrastructure in the scanning electron microscope;Barnes;Scanning Electron Microsc.,1986
4. Morphological aspects of extra cellular polysaccharides;Bennett;J. Histochem. Cytochem.,1963
5. Palynology of subtribe Scorzonerinae (Compositae: Lactuceae) and its taxonomic significance;Blackmore;Ghana,1982