Reuse Excel business logic with PHPExcel - Maarten Balliauw {blog}
Impossible to have calculated cells (formulas) with PHPExcel_Writer_Excel2007 · Issue #846 · PHPOffice/PHPExcel · GitHub
php - Reading values from specific range of cells using phpexcel - Stack Overflow
phpexcel/Calculation.php at master · hoaquynhtim99/phpexcel · GitHub
php - Read Excel's internal calculated values with PHPExcel - Stack Overflow
Accessing cells - PhpSpreadsheet Documentation
Calculation Engine - PhpSpreadsheet Documentation
ILIAS: PHPExcel_Calculation Class Reference
PHPExcel/Calculation.php at 1.8 · PHPOffice/PHPExcel · GitHub
Accessing cells - PhpSpreadsheet Documentation
2016
php - calculating sum with PHPExcel - Stack Overflow
phpexcel 1.8.1 Calculation error · Issue #1176 · PHPOffice/PHPExcel · GitHub
ILIAS: PHPExcel_Calculation Class Reference
How to Create/Read EXCEL files in PHP - IOmundo
PHPExcel Developer Documentation | PDF | Spreadsheet | Microsoft Excel
php - How to automatically read in calculated values with PHPExcel? - Stack Overflow
Accessing cells - PhpSpreadsheet Documentation
Replace Excel errors using this function - Journal of Accountancy
How to Sum Diagonal Cells in a range in Excel? - GeeksforGeeks
phpexcel - Sum calculation of excel column - PHP Excel - Stack Overflow
PHPExcel returns Zero “0” in parsing for a formula in a xlsx file. · Issue #705 · PHPOffice/PHPExcel · GitHub
ILIAS: PHPExcel_Calculation Class Reference
