Paper Download

SCi-hub
https://sci-hub.se/
https://blog.csdn.net/Julialove102123/article/details/80049846
http://zh.booksc.org/
https://g3.luciaz.me/extdomains/scholar.google.com/
心灵之约
http://gen.lib.rus.ec/
https://scholar.chongbuluo.com/

Microsoft:
https://academic.microsoft.com/search?q=&f=&orderBy=0&skip=0&take=10

BASE:
https://www.base-search.net/Search/Results?type=all&lookfor=UAV-Enabled+Age-Optimal+Data+Collection+in+Wireless+Sensor+Networks&ling=1&oaboost=1&name=&thes=&refid=dcresen&newsearch=1

ref:
https://www.bibsonomy.org/bibtex/2c73e3668c4d178473c2b03cfb0fae3af/e.fischer

https://dblp.uni-trier.de/rec/bibtex/journals/corr/abs-1709-05254