Pandeliev, Slavcho, and Venelin Roytchev. “Comparative Scanning Electron Microscopy Investigations on Some Characteristics of the Pollen Aperture Complex in Seedless Grape <em>Vitis vinifera< em> L. Cultivars”. OENO One, vol. 30, no. 1, Mar. 1996, pp. 1-6, doi:10.20870/oeno-one.1996.30.1.1115.