帮忙找两篇文章,谢谢各位了

最近因为课题需要,要寻找两片国外的论文,不是IEEE论文,具体情况如下:
[1] G. Hua and F. C. Lee, “Novel full-bridge zero-current-switched PWM converter,” in Proc. 4th Europ. Conf Power Electron. and Appl., vol.2, 1991, pp. 29-34.
[2] R. P. Sevens and G. E. Bloom, “Modern DC-to-DC Switched Mode Power Converter Circuits”. New York: Van Nostrand Reinhold Company,1985.

导师要求我必须把这两篇文章看熟,唉... 可惜我找不到...
谢谢各位了...