{"type": {"key": "/type/work"}, "title": "Einf\u00fchrung in die Mengenlehre und die Theorie der reellen Funktionen", "subjects": ["Set theory"], "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL126218A"}}], "key": "/works/OL45249362W", "latest_revision": 1, "revision": 1, "created": {"type": "/type/datetime", "value": "2026-04-27T20:39:45.041897"}, "last_modified": {"type": "/type/datetime", "value": "2026-04-27T20:39:45.041897"}}