Intraradicular bacteria and fungi in root-filled, asymptomatic human teeth with therapy-resistant periapical lesions: A long-term light and electron microscopic follow-up study

Journal of Endodontics - Tập 16 - Trang 580-588 - 1990
P.N. Ramachandran Nair, Ulf Sjögren, Gunthild Krey, Karl-Erik Kahnberg, Göran Sundqvist