Online access to issues 2004−2022:

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SIGMA-NOT offers the purchase of limited-time access  to the archival issues. The limited-time access commences with the first signing-in - following a fee receipt notice, which will be communicated by SIGMA-NOT by email. You can also purchase the following: a single publication or single issue of the magazine. Available forms of payment: SMS, , credit card, postal transfer, bank transfer. SIGMA-NOT issues an invoice for each transaction (except for SMS transfers). The user may print a proforma invoice via the Portal. The original invoice will be sent to the user by post to the address provided in the registration form within 14 days from completing the transaction.
Archival print version issues 
Please contact the Editorial to purchase any archival issues in the traditional print version