@article{pemberton_hertogh_1994, title={Influence of harvest date and 2C storage on floral development of Dutch-grown Astilbe}, volume={119}, number={2}, journal={Journal of the American Society for Horticultural Science}, author={Pemberton, G. H. and Hertogh, A. A. de}, year={1994}, pages={144} }
 @article{pemberton_hertogh_1992, title={Floral development of Astilbe x arendsii}, ISBN={906605235X}, number={325}, journal={Acta Horticulturae}, author={Pemberton, G. H. and Hertogh, A. A. de}, year={1992}, pages={229} }