Update README.md

Author: LiangliangNan

README.md

@@ -5,7 +5,7 @@
 
 
 AdTree implements the tree reconstruction method described in the following [paper](https://3d.bk.tudelft.nl/liangliang/publications/2019/adtree/AdTree_RS-2019.pdf):
-```
+```c++
 Shenglan Du, Roderik Lindenbergh, Hugo Ledoux, Jantien Stoter, and Liangliang Nan.
 AdTree: Accurate, Detailed, and Automatic Modelling of Laser-Scanned Trees.
 Remote Sensing. 2019, 11(18), 2074.
@@ -100,8 +100,7 @@ If you use the code/program (or part) of AdTree in a scientific work, please cit
   volume={11},
   number={18},
   pages={2074},
-  year={2019},
-  publisher={Multidisciplinary Digital Publishing Institute}
+  year={2019}
 }
 ```