1. American Mathematical Society Colloquium Publications, Vol. XXV;Birkhoff, Garrett,1967
2. An order topology in ordered topological vector spaces;Carter, Lyne H.;Trans. Amer. Math. Soc.,1976
3. J. M. Ceĭtlin, Unconditional bases and semiorderedness, Izv. Vysš. Učebn. Zaved. Mat. 1966, no. 2(51), 98-104
4. English transl., Amer. Math. Soc. Transl. (2) 90 (1970), 17-25. MR 33 #6362
5. J. M. Ceĭtlin, Unconditional bases and semiorderedness, Izv. Vysš. Učebn. Zaved. Mat. 1966, no. 2(51), 98-104; English transl., Amer. Math. Soc. Transl.