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[10] https://damatajhiz.com/categories/97/
[11] https://www.solartubs.com/advantages-of-solar- vacuum-tubes.html
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[13] http://solarpolar.ir
[14] http://www.sabainfo.ir/fa/news/684
[15] http://www.asrenaft.com/report
[16] https://www.iranjib.ir/showgroup/23/realtime_price
[17] https://www.amar.org.ir
[18] https://www3.epa.gov/ttnchie1/ap42/ch01/final/c01s04.pdf
[20] http://www.crses.sun.ac.za/files/services/events/workshops/03_Design%20ST%20Systems_Calculation%20methods.pdf