1. Cook, T. (1978). The geometry of generalized quantum logics,International Journal of Theoretical Physics,17, 941?955.
2. Cook, T. (1988). Riesz spaces and quantum logics, preprint.
3. Cook, T., and Rüttimann, G. T. (1985). Symmetries on quantum logics,Reports on Mathematical Physics,21, 121?126.
4. Flachsmeyer, J. (1979). Underlying Boolean algebras,Mathematical Centre Tracts,115, 91?103.
5. Iwamura, T. (1944). A lemma on directed sets,Zenkoku Shijo Sugaku Danwakai,262, 107?111.