{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Harmonic Vector Fields: Variational Principles and Differential Geometry","author_name":"Sorin Dragomir, Domenico Perrone","thumbnail_url":"https://www.ebooknetworking.net/books/012/415/big0124158269.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-0124158269.html\">Harmonic Vector Fields: Variational Principles and Differential Geometry</a>","width":400,"height":300}