1. “Animal Mechanics.”;Alexander,1968
2. Model for the structure of the gastric mucus gel;Allen;Nature (London),1976
3. “Invertebrate Zoology,”;Barnes,1968
4. Mucus trail following by the slug Limax grossui;Cook;Anim. Behav.,1977
5. Denny, M. W. (1979). The role of mucus in the locomotion and adhesion of the pulmonate slug, Ariolimax columbianus. Ph.D. Thesis, Univ. of British Columbia, Vancouver.