@article{GDZPPN001167677,
title = {Numerical Methods of High-Order Accuracy for Nonlinear Boundary Value Problems. IV. Periodic Boundary Conditions.},
journal = {Numerische Mathematik},
volume = {11},
year = {1968},
pages = {266-279},
zbl = {0181.18303},
url = {http://dml.mathdoc.fr/item/GDZPPN001167677}
}
CIARLET, P.G.; VARGA, R.S.; SCHULTZ, M.H. Numerical Methods of High-Order Accuracy for Nonlinear Boundary Value Problems. IV. Periodic Boundary Conditions.. Numerische Mathematik, Tome 11 (1968) pp. 266-279. http://gdmltest.u-ga.fr/item/GDZPPN001167677/