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| Poveda, Juan-Carlos, Molina, Daniel-Ricardo and Pantoja-Agreda, Edgar-Francisco 1H- AND 13C-NMR STRUCTURAL CHARACTERIZATION OF ASPHALTENES FROM VACUUM RESIDUA MODIFIED BY THERMAL CRACKING. C.T.F Cienc. Tecnol. Futuro, Jan 2014, vol.5, no.4, p.49-59. ISSN 0122-5383
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