Analysis of information sources in references of the Wikipedia article "Lao động cưỡng bức tại Đức Quốc xã trong Thế chiến II" in Vietnamese language version.
Also in: Eksploatacja ekonomiczna ziem polskich (Economic exploitation of Poland's territory) by Dr. Andrzej Chmielarz, Polish Resistance in WW2, Eseje-Artykuły.
Also in: Eksploatacja ekonomiczna ziem polskich (Economic exploitation of Poland's territory) by Dr. Andrzej Chmielarz, Polish Resistance in WW2, Eseje-Artykuły.