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2. 3) International Energy Agency : “CO2 emissions from fuel combustion 2019”, available from <http://www.iea.org>, (accessed 2020-4-15).
3. 9) ISO 14687-2, Hydrogen fuel — Product specification — Part 2 : Proton exchange membrane (PEM) fuel cell applications for road vehicles (2012).
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5. 11) ASTM D7652-11, Standard test method for determination of trace hydrogen sulfide, carbonyl sulfide, methyl mercaptan, carbon disulfide and total sulfur in hydrogen fuel by gas chromatography and sulfur chemiluminescence detection (2011).