@article{Ling2016, author = "Xing Ling and Hans-Jürgen Butt and Michael Kappl", title = "{Quantitative Measurement of Friction between Single Microspheres by Friction Force Microscopy}", year = "2016", month = "2", url = "https://acs.figshare.com/articles/journal_contribution/Quantitative_Measurement_of_Friction_between_Single_Microspheres_by_Friction_Force_Microscopy/2993887", doi = "10.1021/la700408v.s003" }