Novel α-sulfamidophosphonate analogues of fotemustine: efficient synthesis using ultrasound under solvent-free conditions. - Guerfi, Meriem; Berredjem, Malika; Bouzina, Abdeslem; Ben Hadda, Taibi; Marminon, Christelle; Otmane Rachedi, Khadidja (Chemical Monthly / Monatshefte für Chemie, 2020)