{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Variational Methods in Mathematics, Science and Engineering","author_name":"Karel Rektorys","thumbnail_url":"https://www.ebooknetworking.net/books/940/116/big9401164525.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-9401164525.html\">Variational Methods in Mathematics, Science and Engineering</a>","width":400,"height":300}