private function _writeBIFF8CellRangeAddressFixed($range = 'A1')
	{
		$explodes = explode(':', $range);

		// extract first cell, e.g. 'A1'
		$firstCell = $explodes[0];

		// extract last cell, e.g. 'B6'
		if (count($explodes) == 1) {
			$lastCell = $firstCell;
		} else {
			$lastCell = $explodes[1];
		}

		$firstCellCoordinates = PHPExcel_Cell::coordinateFromString($firstCell); // e.g. array(0, 1)
		$lastCellCoordinates  = PHPExcel_Cell::coordinateFromString($lastCell);  // e.g. array(1, 6)

		return(pack('vvvv',
			$firstCellCoordinates[1] - 1,
			$lastCellCoordinates[1] - 1,
			PHPExcel_Cell::columnIndexFromString($firstCellCoordinates[0]) - 1,
			PHPExcel_Cell::columnIndexFromString($lastCellCoordinates[0]) - 1
		));
	}