1. On the foundations of combinatorial theory VI;Doubilet,1972
2. Reflexivity and coalgebras of finite type;Heyneman;J. Algebra,1974
3. Pointed Coalgebras and Incidence Coalgebras;Marlowe,1975
4. Coreflexive coalgebras;Radford;J. Algebra,1973
5. Hopf Algebras;Sweedler,1969