{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Necessary Conditions for an Extremum (Chapman & Hall/CRC Pure and Applied Mathematics)","author_name":"Pshenichnyi","thumbnail_url":"https://www.ebooknetworking.net/books/082/471/big082471556X.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-082471556X.html\">Necessary Conditions for an Extremum (Chapman &amp; Hall/CRC Pure and Applied Mathematics)</a>","width":400,"height":300}