求助两篇文献，谢谢！

求助查找两篇文献
Hippocampal sharp waves: their origin and significance  作者Buzsáki G

High-frequency network oscillation in the hippocampus.作者Buzsáki G, Horváth Z, Urioste R, Hetke J, Wise K.

谢谢！

两篇文章都太早了，很难找到。