[Sansevierias] Please help to identify the plant... [2 Attachments]

Hi everyone, I'll be very grateful for any help in identifying the plant that I've bought recently.
Two pictures are attached. The biggest leaf is about 32 cm (12.6 inches) high, 8 cm (3 inches) wide. The leaves are smooth on both sides and rather thin (if compared to S. tr., for instance), with a yellowish stripe in the center of a leaf.

Olga