{"type": {"key": "/type/work"}, "title": "Le\u00e7ons sur le calcul diff\u00e9rentiel", "subjects": ["Differential calculus"], "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL1537955A"}}], "key": "/works/OL45828871W", "latest_revision": 1, "revision": 1, "created": {"type": "/type/datetime", "value": "2026-07-27T05:28:33.465854"}, "last_modified": {"type": "/type/datetime", "value": "2026-07-27T05:28:33.465854"}}