5Kari P R, Chandy T, Sharma C P. Chitosan/calcium-alginate beads for oral delivery of insulin[J] .J Appl Polymer Sci, 1996,59 : 1795.
6Xiudong Liu, et al. Swelling behaviour of alginate-chitosan microcapsules prepared by external gelation or internal gelation technology [ J ]. Carbohydrate Polymers, Issue 4,2004,56 ( 7 ) : 459-464.
7Antonio J Ribeiro, et al. Mieroencapsulation of lipophilic drugs in chitosan-coated alginate microspheres [ J ]. International Journal of Pharmaceutics, 1999,187 ( 1 ) : 115-123.
8S.K.Bajpai,Rasika Tankhiwale.Investigation of water uptake behavior and stability of calcium alginate/chitosan bi-polymeric beads :Part- 1 [ J ]. Reactive & Functional Polymers, 2006,66 : 645-658.
9Bhesh R Bhandari,et al.encapsulation of lemon oil by paste method using β- cyclodextrin, encapsulation and profile of oil volatiles[ J ] .Agric Food Chem, 1999,47 (12) :5190-5197.