{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Calculus of Variations I (Grundlehren der mathematischen Wissenschaften) (Vol 1)","author_name":"Mariano Giaquinta, Stefan Hildebrandt","thumbnail_url":"https://www.ebooknetworking.net/books/354/050/big354050625X.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-354050625X.html\">Calculus of Variations I (Grundlehren der mathematischen Wissenschaften) (Vol 1)</a>","width":400,"height":300}