{"created": {"type": "/type/datetime", "value": "2009-12-10T22:37:10.977816"}, "subjects": ["Astrophysics", "Celestial mechanics", "Cosmology"], "latest_revision": 5, "key": "/works/OL8303934W", "title": "Changes Within Physical Systems And/or Conservation Of Energy And Momentum", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL2759071A"}}], "type": {"key": "/type/work"}, "last_modified": {"type": "/type/datetime", "value": "2020-02-28T11:42:38.746285"}, "covers": [1746631], "revision": 5}