Hello everybody! I'm finishing my graduation in Biology this year and to conclude it, I have to present a study about a theme of my choice. I'm thinking about doing a review about how the shell in coleoidea got internalized, however, I have absolute no clue on bibliography beside a book of Bizikov that is in russian. Could you please suggest me some papers and/or books that might help me in finishing my work? Thanks! PS: Sorry for my bad english. It's been quite a while since I last wrote something in this language.