[1] DVUREČENSKIJ A.: States on pseudo MV-algebras. Studia Logica 60 (2001), 301-327. MR 1865858 | Zbl 1081.06010

[2] DVUREČENSKIJ A.: States and idempotents of pseudo MV-algebras. Tatra Mt. Math. Publ. 22 (2001), 79-89. MR 1889036 | Zbl 0997.03050

[3] DVUREČENSKIJ A.: Pseudo $MV$-algebras are intervals in $\ell$-groups. J. Austral. Math. Soc. 70 (2002) (To appear). MR 1902211 | Zbl 1027.06014

[4] DVUREČENSKIJ A., KALMBACH G.: States on pseudo MV-algebras and the hull-kernel topology. Atti Sem. Mat. Fis. Univ. Modena (2002) (To appear). MR 1910782 | Zbl 1096.06009

[5] GEORGESCU G., IORGULESCU A.: Pseudo MV-algebras. Multi. Val. Log. 6 (2001), 95-135. MR 1817439 | Zbl 1014.06008

[6] JAKUBÍK J.: Direct product decompositions of pseudo MV-algebras. Arch. Math. (Brno) 37 (2001), 151-166. MR 1838410 | Zbl 1070.06003

[7] RACHŮNEK J.: A non-commutative generalization of MV-algebras. Czechoslovak Math. J., (To appear). MR 1905434 | Zbl 1012.06012