参考文献/References:
[1] Blyth T S,Varlet J C.Ockham algebras [M].Oxford:Oxford University Press,1994.
[2] Blyth T S,Varlet J C.On a common abstraction of de Morgan algebras and Stone algebras [J].Proc Roy Soc Edinburgh,1983,94(3/4):301-308.
[3] Fang Jie.Distributive lattices with unary operations [M].Beijing:Science Press,2011.
[4] Blyth T S,Fang Jie.Extended Ockham algebras [J].Communications in Algebra,1999,27(11):5413-5422.
[5] Blyth T S,Fang Jie.Symmetric extended Ockham algebras [J].Algebra Colloquium,2003,10(4):479-489.
[6] Fang Jie.The isotone mappings on Ockham algebras [J].Acta Math Sinica New Series,1996,12(1):43-48.