@article{murphy2007adhesion,
  title = {Adhesion and anisotropic friction enhancements of angled heterogeneous micro-fiber arrays with spherical and spatula tips},
  journal = {Journal of Adhesion Science and Technology},
  volume = {21},
  number = {12-13},
  pages = {1281--1296},
  publisher = {Taylor \& Francis Group},
  year = {2007},
  author = {Murphy, Michael P and Aksak, Burak and Sitti, Metin}
}