Makarov, V. I.     Weight uniform accuracy astimates of finite difference method for poisson equation, taking into account boundary effect [Текст] / V.I. Makarov, L.I. Demkiv // Numerical analysis and its applications : rev. sel. papers 4th Intern. conf., Lozenetz, Bulgaria, June 16-20, 2008. — Berlin, 2008. — P. 92-103.