| ANNA Association of National Numbering Agencies | http://www.anna-web.com |
| ACSDA America’s Central Securities Depositories Association | http://www.acsda.org/index.html |
| Standard & Poor's | http://www.standardandpoors.com |
| ISO (International Organisation for Standardisation) | http://isotc.iso.ch/livelink/livelink |
| Bloomberg.com financial markets commodities news | http://www.bloomberg.com |
| Guayaquil Stock Exchange | http://www.mundobvg.com |
| Quito Stock Exchange | http://www.bolsadequito.com/zhtmls/bvq_home.asp |