@article{SMBlog:2011-04-20,
	author = {Steven M. Bellovin},
	title = {Apple and Location-Tracking},
	date = {2011-04-20},
	year = {2011},
	month = {April 20,},
	journal = {SMBlog: Steve Bellovin's Blog (blog)},
	url = {https://www.cs.columbia.edu/~smb/blog/2011-04/2011-04-20.html},
}