{"title": "Foundations of the calculus", "key": "/works/OL13403352W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL6292531A"}}], "type": {"key": "/type/work"}, "subjects": ["Calculus"], "covers": [14365997], "latest_revision": 3, "revision": 3, "created": {"type": "/type/datetime", "value": "2009-12-11T09:28:45.598513"}, "last_modified": {"type": "/type/datetime", "value": "2023-07-01T04:35:04.272440"}}