{"last_modified": {"type": "/type/datetime", "value": "2018-11-15T13:20:59.413314"}, "title": "Calculus of variations", "created": {"type": "/type/datetime", "value": "2018-11-15T13:20:59.413314"}, "subjects": ["Calculus of variations"], "latest_revision": 1, "key": "/works/OL17957680W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL124569A"}}], "type": {"key": "/type/work"}, "revision": 1}