www.iccwbo.org;

www.icc-ccs.org/icc/imb

en.wikipedia.org/wiki/List_of_crude_oil_products

nebula.wsimg.com/2ae6e0dde2495b779129fcfcb9d988fe?AccessKeyId=CF4982BAFB3AA90D79CB&disposition=0&alloworigin=1

www.e-education.psu.edu

top-petroleum.com/refinery.php

www.kittiwake.com/refinery_process

wiki.anton-paar.com,

www.bomin.com/glossary

www.platts.com;

www.bunkerworld.com/prices

www.iata.org/publications/economics/fuel-monitor/Pages/price-analysis.aspx

www.bloomberg.com/energy

www.iso.org;

www.api.com;

www.opec.org;

www.iaphworldports.org;

www.Convert-Me.com;

www.bankersalmanac.com;

www.swift.com;

www.portarivel.com;

www.x-rate.com;

www.bankersssaceuity.com;

www.oceanintelligence.com;

www.portworld.com;

www.distance.com;

www.leterofcredit.biz/ucp600;

www.bankerworld.com;

www.isri.org;

www.lbma.org.uk;

www.lme.com;

www.kortes.com