. . . . . . . . "Quaternion, \u03C4\u03B5\u03C4\u03C1\u03B1\u03B4\u03CC\u03BD\u03B9\u03BF \u0395\u03AF\u03BD\u03B1\u03B9 \u03BC\u03AF\u03B1 \u03BC\u03B1\u03B8\u03B7\u03BC\u03B1\u03C4\u03B9\u03BA\u03AE \u03BF\u03BD\u03C4\u03CC\u03C4\u03B7\u03C4\u03B1."@el . . . . "\u03A4\u03B5\u03C4\u03C1\u03AD\u03BD\u03B9\u03BF"@el . . . . . "Quaternion, \u03C4\u03B5\u03C4\u03C1\u03B1\u03B4\u03CC\u03BD\u03B9\u03BF \u0395\u03AF\u03BD\u03B1\u03B9 \u03BC\u03AF\u03B1 \u03BC\u03B1\u03B8\u03B7\u03BC\u03B1\u03C4\u03B9\u03BA\u03AE \u03BF\u03BD\u03C4\u03CC\u03C4\u03B7\u03C4\u03B1."@el . .