To meet the demand of our readers, at this special time for all of us,
SIGMA-NOT Publishing will provide you with FREE ACCESS to the resources of the TECHNICAL INFORMATION PORTAL www.sigma-not.pl of your subscribed paper title.
Please contact the Publisher : prenumerata@sigma-not.pl.
Write “Free access code” in the title of the message.
In the body of the email, please include your tax ID number and payer address(for identification purposes).
In response, you will receive a CODE to log in to the Portal with instructions for activation.
