*AnnMari Jansson, [https://books.google.co.uk/books?hl=iw&lr=&id=yk8VDczLZj4C&oi=fnd&pg=PR2&dq=natural+capital&ots=FIOM3cqn5J&sig=uR9vNs0CppSkCLvukmOtEduhT20#v=onepage&q=natural%20capital&f=false Investing in Natural Cpital: The Ecological Economics Approach to Sustainability], Island Press, 1994 | *AnnMari Jansson, [https://books.google.co.uk/books?hl=iw&lr=&id=yk8VDczLZj4C&oi=fnd&pg=PR2&dq=natural+capital&ots=FIOM3cqn5J&sig=uR9vNs0CppSkCLvukmOtEduhT20#v=onepage&q=natural%20capital&f=false Investing in Natural Cpital: The Ecological Economics Approach to Sustainability], Island Press, 1994 |