@article{ETD,
      school = {Ph.D.},
      author = {Ozertem, Umut and },
      url = {http://digitalcollections.ohsu.edu/record/332},
      title = {Locally defined principal curves and surfaces},
      publisher = {Oregon Health and Science University},
      number = {ETD},
      doi = {https://doi.org/10.6083/M4ZG6Q60},
      recid = {332},
      address = {2008},
}