A. A. Watad, M. Kochba, A. Nissim and V. Gaba, "Improvement of Aconitum napellus micropropagation by liquid culture on floating membrane rafts", Journal Plant Cell Reports, Publisher: Springer Berlin / Heidelberg, ISSN0721-7714 (Print) ISSN1432-203X (online), Volume 14, Number 6 / March 1995, DOI 10.1007/BF00238594, pages 345–348