PACS:66.20.+d, 64.60.Fr (all) DOI:10.1070/PU1986v029n06ABEH003420 URL: https://ufn.ru/en/articles/1986/6/f/ Citation: Fabelinskii I L, Krivokhizha S V, Chaikov L L "Experimental studies of solutions with a 'double' critical point" Sov. Phys. Usp.29 572–573 (1986)