@article{article, title = {{The PTCR effect of donor-doped barium titanate: Origin of the surface states at the grain-boundary}}, url = {{}}, year = {{2006}}, month = {{1}}, author = {{Li B and Zhou D and Huang H and West AR}}, volume = {{174}}, journal = {{Ceramic Transactions}}, pages = {{131-138}}, note = {{Accessed on 2024/12/22}}}