{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Calculus of Variations (Cambridge Studies in Advanced Mathematics)","author_name":"Jürgen Jost, Xianqing Li-Jost","thumbnail_url":"https://www.ebooknetworking.net/books/052/105/big0521057124.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-0521057124.html\">Calculus of Variations (Cambridge Studies in Advanced Mathematics)</a>","width":400,"height":300}