id	domain	url
fuelectenerg-4981	doi.org	https://doi.org/10.2298/fuee2001061n
fuelectenerg-4981	www.engineeringtoolbox.com	https://www.engineeringtoolbox.com/relative-permittivity-d_1660.html
fuelectenerg-4981	onlinelibrary.wiley.com	http://onlinelibrary.wiley.com/doi/10.1002/mop.v48:10/issuetoc
fuelectenerg-4981	ieeexplore.ieee.org	http://ieeexplore.ieee.org/xpl/tocresult.jsp?isnumber=7579242
fuelectenerg-4981	www.engineeringtoolbox.com	https://www.engineeringtoolbox.com/relative-permittivity-d_1660.html