参考书目问题

Question

在为我的 IEEE 会议论文撰写参考文献时，我遇到了以下问题。我发布了图片，可以看到，年份部分是在第一个参考文献的末尾提到的，而在第二张图片中，年份部分则在两者之间。

以下是各篇论文的 bibtex 格式：

@article{Sesen2013,
    author  = {Sesen, M.B. and Nicholson, A.E. and Banares-Alcantara, R. and Kadir, T. and Brady, M.},
    title = {{Bayesian} networks for clinical decision support in lung cancer care},
    journal = {PloS one},
    volume = {8},
    pages = {1--13},
    year = {2013},
}

对于第二张图片

@inproceedings{Zhang2007,
    author = {Zhang, R. and Bivens, A.},
    title = {Comparing the Use of {Bayesian} Networks and Neural Networks in Response Time Modeling for Service-oriented Systems},
    booktitle = {Proc. of Workshop on Service-oriented Computing Performance: Aspects, Issues, and Approaches (SOCP)},
    pages = {67--74},
    year = {2007},
} 

我哪里做错了。我假设在 bibtex 末尾写入属性“year”会导致它在末尾打印出来。