1. Abawi GS, Robinson RW, Cobb AC, Shail JW (1980) Reaction of lettuce germplasm to artificial inoculation with Sclerotinia minor under greenhouse conditions. Plant Dis 64:668–671
2. Alconero R (1983) Regeneration of plants from cell suspension of Lactuca saligna, Lactuca sativa, and Lactuca serriola. HortSci 18:305–307
3. Bannerot H, Boulidard L, Marrou J, Dutiel M (1969) Etude de l’hérédité de la tolérance au virus de la mosaïque de la laitue chez la varieté Gallega de envierno. Ann Phytopathol 1:219–226
4. Bensink J (1958) Heading of lettuce(Lactuca sativa L.) as a morphogenetic effect of leaf growth. Proc 15th Int Hortic Congr, Nice, pp 470–475
5. Berry SF, Lu DY, Pental D, Cocking EC (1982) Regeneration of plants from protoplasts of Lactuca sativa L. Z Pflanzenphysiol 108:31–38