@article{378156,
      recid = {378156},
      author = {Yeo, Adrian.},
      title = {Trig or treat an encyclopedia of trigonometric identity  proofs (TIPs), intellectually challenging games /  [electronic resource] :},
      publisher = {World Scientific Pub.,},
      address = {Singapore :},
      pages = {xiv, 399 p. :},
      year = {2007},
      url = {http://library.usi.edu/record/378156},
}