求助四篇论文的doi号，谢谢
1. Bary, B. 2002. Coupled Hydro-Mechanical and Damage Model for Concrete as an Unsaturated Porous Medium. 15th ASCS Engineering Mechanical Conference. 1-8. New York: Columbia University
2. Corey, A. T. 1954. The interrelation between gas and oil relative permeabilities. Prod. Monthly, 19(1), 38-41.
3. Regmi, R. K., Nakagawa, H., Kawaike, K., Baba, Y., and Zhang, H. 2010. Two and three dimensional slope stability analysis of landslide dam failure due to sliding. Annuals Disaster Prevention Research Institute, Kyoto University, No. 53 B, 617-627
4. Sako, K., Danjo, T., Fukagawa, R., and Bui, H. H. 2011. Measurement of pore-water and pore-air pressure in unsaturated soil. Proceeding of 5th Asia-Pacific Conference on Unsaturated Soils, 443-448. Thailand: Kasetsart University
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好像是会议论文，个别论文本身就没有doi
那编辑要求参考文献有doi号，如果文献本身就没有的话就可以不写吗
，
应该是可以的吧。
我的上次有一个参考文献也是会议，没有doi，最后编辑也没说什么。