108: MARIO BELLINI, Divisumma 28 and Divissuma 18 < Taxonomy of Design: Selections from Thessaloniki Design Museum, 25 August 2016 < Auctions | Wright: Auctions of Art and Design
Olivetti Divisumma 26 Vintage Ancient Calculator-Old Calculator Olivetti | eBay
Olivetti Divisumma 24 Collection Calculator for sale at Pamono
John Wolff's Web Museum - Olivetti Divisumma 18
Olivetti Divisumma 24 GT
Mario Bellini racconta Divisumma 18: la calcolatrice elettronica portatile realizzata nel 1973 dalla Olivetti - Arte.Go.it