Every reference with a DOI in the deposited reference list resolved to a known
work in Crossref or DataCite at the dated check, and none carried a retraction,
withdrawal, or removal notice.
The 24 references without a DOI — listed, not checked
no DOI — not checkedLevitt M.—Methods of carrying out and reporting freeze/thaw tests on concrete. Materials and Structures, Vol. 10, No. 58, 1977, pp. 209–215.
no DOI — not checkedFagerlund G.—RILEM Recommendation:The critical degree of saturation method of assessing the freeze/thaw resistance of concrete. Materials and Structures, Vol. 10, No. 58, 1977, pp. 217–229.
no DOI — not checkedWarris B.—The influence of air-entrainment on the frost-resistance of concrete. Part B.Hypothesis and freezing Experiments. Proc. No. 36, Swedish Cement and Concrete Research Institute, Stockholm, 1964, 130 p.
no DOI — not checkedFagerlund G.—Critical degrees of saturation at freezing of porous and brittle materials. Report 34, Div. of Build. Technology, Lund. Inst. of Technology, Lund, (Sweden), 1972, 408 p. (208 fig.) (in Swedish).
no DOI — not checkedFagerlund G.—Critical moisture contents at freezing of porous materials. Proc. Vol. 2, 2nd Int. CIB/RILEM. Symposium on Moisture Problems in Buildings, Rotterdam, September 10–12, 1974, 17 p.
no DOI — not checkedFagerlund G.—The significance of critical degrees of saturation at freezing of porous and brittle materials. Part of Durability of Concrete, Amer. Concrete Inst. Publication SP-47, Detroit, 1975, pp. 13–65.
no DOI — not checkedFagerlund G.—Final test schedule for cooperative frost resistance test based on critical degrees of saturation. Typed manuscript, Dept. of Build. Materials, Lund Inst. of Technology, Lund, August 1973, 36 p.
no DOI — not checkedVuorinen J.—On determination of effective degree of saturation of concrete. Manuscript from Concrete and Soils Laboratory, Imatran Voima Oy, Oulu, Finland, 1973.
no DOI — not checkedModéer M.—Diploma work at the Dept of Building Materials, Lund Inst. of Technology, Lund 1975.
no DOI — not checkedAhlgren L.—Moisture fixation in porous building materials. Report 36, Div. of Building Technology, Lund Inst. of Technology, Lund, 1972, 197 p. (in Swedish).
no DOI — not checkedBažant Z. P., Najjar L. J.—Nolinear water diffusion in nonsaturated concrete. Materials and Structures, Vol. 5, No. 25, 1972, pp. 3–20.
no DOI — not checkedHouiou A.—Étude de la gélivité des bétons. Contribution à la Fondation Française d'Études Nordiques, VIe Congrès International: Les problèmes posés par la gélifraction. Recherches fondamentales et appliquées, Le Havre, 23–25 avril 1975.
no DOI — not checkedBergström S. G.—Private communication. Swedish Cement and Concrete Research Institute, Stockholm.
no DOI — not checkedGrudemo A.—Unpublished experimental data. Swedish Cement and Concrete Research Institute, Stockholm.
no DOI — not checkedSigurdsson G.—Relations between water cement ratio, concrete age, temperature and degree of hydration. Diploma work at the Dept of Building Materials, Lund Inst. of Technology, Lund, 1972 (in Swedish).
no DOI — not checkedNilsson L. O.—Drying of concrete. Influence of the composition. Nordisk Betong No. 1, 1976, (in Swedish).
no DOI — not checkedPowers T. C.—The air requirement of frost-resistant concrete. Proc. HRB, 29, 1949, pp. 184–202.
no DOI — not checkedDanielsson U., Wastesson A.—The frost resistance of cement paste as influenced by surface-active agents. Proc. No. 30, Swedish Cement and Concrete Research Institute, Stockholm, 1958, 36 p.
no DOI — not checkedFagerlund G.—Studies of the destruction mechanism at freezing of porous materials. Contribution to Fondation Française d'Études Nordiques, VIe Congrès International: Les problèmes posés par la gélifraction. Recherches fondamentales et appliquées, Le Havre, 23–25 avril 1975. (Also as report No. 1:76 from the Cement and Concrete Research Institute, Stockholm, 1976, 28 p.)
no DOI — not checkedLarsson T. D., Cady P. D., Malloy J. J.—The protected paste volume concept using new air-void measurement and distribution techniques, Journal of Materials, Vol. 2, No. 1, March 1967, pp. 202–226.
no DOI — not checkedWarris B.—The influence of air-entrainment on the frost-resistance of concrete. Part A.Void distribution, Proc. No. 35, Swedish Cement and Concrete Research Institute, Stockholm, 1963, 38 p.
no DOI — not checkedPowers T. C., Brownyard T. L.—Studies of the physical properties of hardened portland cement paste. Part VIII;The freezing of water in hardened portland cement paste. Lab. Portl. Cement Ass. Bull., 22, 1948.
no DOI — not checkedFagerlund G.—Non-freezable water contents of porous building materials. Report 42, Div. of Build. Technology, Lund Inst. of Technology, Lund (Sweden), 1974, 182 p.
no DOI — not checkedWarris B.—Influence of water-reducing and air-entraining admixtures on the water-requirement, air-content, strength, modulus of elasticity, shrinkage and frost-resistance of concrete. International Symp. on Admixtures for Mortar and Concrete, Brussels, August 30th–September 1st, 1967. Report III/IV/1, pp. 5–16.
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