1. Kay Magaard, Sergey Shpectorov, and Helmut Völklein, A GAP package for braid orbit computation and applications, Experiment. Math. 12 (2003), no. 4, 385–393.[MR]
  2. Justin McInroy and Sergey Shpectorov, On the simple connectedness of hyperplane complements in dual polar spaces. II, Discrete Math. 310 (2010), no. 8, 1381–1388.[MR/doi]