Porosity determination of pre salt core fragments by non-destructive pycnometry techniques - Macedo, Rafael dos Santos; Simoncelli, Ana Paula Palhares; Gouvêa, Rodrigo César Teixeira de; Gonçalves, Leonardo; Silva Junior, Plinio Cancio Rocha da; Ferrari, Jean Vicente; Ulsen, Carina (Heliyon, 2026)