[1]Whitmore;Southgate[JournaloftheAmericanChemicalSociety,1938,vol.60,p.2572]
[2]Whitmore;Southgate[JournaloftheAmericanChemicalSociety,1938,vol.60,p.2572]
[3]Jamison;Lesslie;Turner[JournaloftheInstituteofPetroleum,1949,vol.35,p.595]
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