Convergence issues in derivatives of Monte Carlo null-collision integral formulations: A solution. - Jean-Marc Tregan; Stéphane Blanco; Jérémi Dauchet; Mouna El Hafi; Richard Fournier; Loris Ibarrart; Paule Lapeyre; Najda Villefranque (J. Comput. Phys., 2020)