1. Aguilar ME, Engelmann F, Michaux-Ferriere N. 1993 . Cryopreservation of cell suspensions of Citrus deliciosa Tan. and histological study. CryoLetters14: 217–228.
2. Axelos M, Curie C, Mazzolini L, Bardet C, Lescure B. 1992 . A protocol for transient gene expression in Arabidopsis thaliana protoplasts isolated from cell suspension cultures. Plant Physiology and Biochemistry30: 123–128.
3. Baba A, Hasezawa S, Syono K. 1986 . Cultivation of rice protoplasts and their transformation mediated by Agrobacterium spheroplasts. Plant and Cell Physiology27: 463–471.
4. Chen THH, Kartha KK, Constabel F, Gusta LV. 1984 . Freezing characteristics of cultured Catharanthus roseus (L). G. Don cells treated with dimethylsulfoxide and sorbitol in relation to cryopreservation. Plant Physiology75: 720–725.
5. Engelmann F, Dambier D, Ollitrault P. 1994 . Cryopreservation of cell suspensions and embryogenic calluses of Citrus using a simplified freezing process. CryoLetters15: 53–58.