{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Calculus of Variations and Partial Differential Equations of First Order","author_name":"Constantin Caratheodory, C. Carathéodory","thumbnail_url":"https://www.ebooknetworking.net/books/082/181/big0821819992.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-0821819992.html\">Calculus of Variations and Partial Differential Equations of First Order</a>","width":400,"height":300}