Update publications in README with SonicBOOM and IEEE Micro (#570)

README.md

@@ -29,13 +29,28 @@ Chipyard is actively developed in the [Berkeley Architecture Research Group][ucb
 
 * See [CONTRIBUTING.md](/CONTRIBUTING.md)
 
-## Chipyard-related Publications
+## Attribution and Chipyard-related Publications
 
-These publications cover many of the internal components used in Chipyard. However, for the most up-to-date details, users should refer to the Chipyard docs.
+If used for research, please cite Chipyard by the following publication:
+
+```
+@article{chipyard,
+  author={Amid, Alon and Biancolin, David and Gonzalez, Abraham and Grubb, Daniel and Karandikar, Sagar and Liew, Harrison and Magyar,   Albert and Mao, Howard and Ou, Albert and Pemberton, Nathan and Rigge, Paul and Schmidt, Colin and Wright, John and Zhao, Jerry and Shao, Yakun Sophia and Asanovi\'{c}, Krste and Nikoli\'{c}, Borivoje}, 
+  journal={IEEE Micro},
+  title={Chipyard: Integrated Design, Simulation, and Implementation Framework for Custom SoCs},
+  year={2020},
+  pages={},
+  doi={10.1109/MM.2020.2996616},
+  ISSN={1937-4143},
+}
+```
+
+These additional publications cover many of the internal components used in Chipyard. However, for the most up-to-date details, users should refer to the Chipyard docs.
 
 * **Generators**
     * **Rocket Chip**: K. Asanovic, et al., *UCB EECS TR*. [PDF](http://www2.eecs.berkeley.edu/Pubs/TechRpts/2016/EECS-2016-17.pdf).
     * **BOOM**: C. Celio, et al., *Hot Chips 30*. [PDF](https://www.hotchips.org/hc30/1conf/1.03_Berkeley_BROOM_HC30.Berkeley.Celio.v02.pdf).
+      * **SonicBOOM (BOOMv3): J. Zhao, et al., *CARRV'20*. [PDF](https://carrv.github.io/2020/papers/CARRV2020_paper_15_Zhao.pdf).
     * **Hwacha**: Y. Lee, et al., *ESSCIRC'14*. [PDF](http://hwacha.org/papers/riscv-esscirc2014.pdf).
     * **Gemmini**: H. Genc, et al., *arXiv*. [PDF](https://arxiv.org/pdf/1911.09925).
 * **Sims**