read csv with long number data get scientific notation

[dpbuzz]

Hi, I have a CSV with one column to read with this data:

SerialNumber
8954310143063931904
8954310143063931938
8954310143063931920
8954310143063931912
8954310143063931896
8954310143063931516
8954310143063931540

I am doing:
$inputFileType='Csv';
$objReader=IOFactory::createReader($inputFileType);
$objWorksheet = $objPHPExcel->getActiveSheet();
$cell=$objWorksheet->getCellByColumnAndRow($col,$fila);

And $cell gets cientific notation like 8.9543101430639E+18 instead of 8954310143063931904
How can solve this problem and get de values as strings?
Thanks