For specific subject search to find commentary in SOLO:
Sustainable development -- Law and legislation
Sustainable development -- International cooperation
Of course topic may also be a chapter or more in works classified as Environmental law, International
Subject searches for the wider topic, not just the legal dimension
Environmental management
Economic development -- Environmental aspects
Social responsibility of business
Applied ecology
Legal Perspectives on Sustainability by 
Sustainable Development Law : principles, practices and prospects by 
The Rio Declaration on Environment and Development by 
The General Exception Clauses of the TRIPS Agreement: Promoting Sustainable Development by 
Foreign Investment and the Environment in International Law by