A hyperluminous obscured quasar at a redshift of z ≈ 4.3. - Efstathiou, Andreas; Małek, Katarzyna; Burgarella, Denis; Hurley, Peter; Oliver, Seb; Buat, Veronique; Shirley, Raphael; Duivenvoorden, Steven; Lesta, Vicky Papadopoulou; Farrah, Duncan; Duncan, Kenneth J; Varillas, María del Carmen Campos (Monthly Notices of the Royal Astronomical Society: Letters, 2021)