Excel

• Excelformeln - www.excelformeln.de
• RibbonX Workshop (René Holtz) - www.rholtz-office.de/index.php?ribbonx=s40
• AJP Excel Information - www.andypope.info
• Online-Excel (Peter Haserodt) - www.online-excel.de
• Excel Tactics - www.exceltactics.com

Excel-Performance

Conditional Format Performance
Writing efficient VBA UDFs
Improving Performance in Excel 2007ff