@phdthesis{Chi2010,
  author    = {Chi, Nguyen Phuong},
  title     = {Research on improvement of contents and methods of teaching the elements of probability and statistics in teh Vietnamese upper-secondary school},
  address   = {Potsdam},
  pages     = {272 S. : graph. Darst.},
  year      = {2010},
  language  = {en}
}