{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Variational Problems in Topology: The Geometry of Length, Area and Volume","author_name":"A.T. Fomenko","thumbnail_url":"https://www.ebooknetworking.net/books/288/124/big2881247407.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-2881247407.html\">Variational Problems in Topology: The Geometry of Length, Area and Volume</a>","width":400,"height":300}