1. Dinculeanu N., Vector Measures, VEB Deutscher Verlag der Wissenschaften, Berlin (1966).
2. Diestel J. and Uhl J. J., Vector Measures, Amer. Math. Soc., Providence, RI (1977). (Math. Surveys; 15.)
3. Kantorovich L. V., Vulikh B. Z., and Pinsker A. G., Functional Analysis in Semiordered Spaces [in Russian], Gostekhizdat, Moscow and Leningrad (1950)
4. Fremlin D. M., “A direct proof of the Matthes—Wright integral extension theorem,” J. London Math. Soc. (2), 11, No. 3, 276–284 (1975).
5. Riečan B., “A simplified proof of the Daniell integral extension theorem in ordered spaces,” Math. Slovaca, 32, No. 1, 75–79 (1982).