Нужны две статьи в одном журнале
European Polymer Journal, Volume 13, Issue 2, 1977, Pages 105-108
Maxim S., Dumitriu E., Ioan S., Carpov A.
Dilute solutions of polyelectrolytes—I. Viscosity dependence of aqueous solutions of poly(methylene N,N-dimethylpiperidinium chloride) upon ionic strength and temperature
European Polymer Journal, Volume 13, Issue 2, 1977, Pages 109-112dx.doi.org/10.1016/0014-3057(77)90146-X
Maxim S., Dumitriu E., Ioan S., Carpov A.
Dilute solutions of polyelectrolytes—II. Determination of unperturbed dimensions of poly (methylene N,N-Dimethylpiperidinium chloride)
СПАСИБОdx.doi.org/10.1016/0014-3057(77)90147-1