@misc{L{\"u}thi2014,
  author    = {L{\"u}thi, Barbara},
  title     = {Migration and Migration History (Version 1.0)},
  edition   = {Version 1.0},
  doi       = {10.14765/zzf.dok.2.316.v1},
  year      = {2014},
  abstract  = {Migration has been a constant feature of human history - "homo migrans" has existed ever since "homo sapiens". Moving away from the traditional nation-based dichotomy of emigration - immigration, the less specific term migration allows for many possible trajectories, time spans, directions and destinations. It can be temporary or long-term, voluntary or forced. It can occur in stages or in cycles, and can be mono-directional or more varied. Generally speaking, however, human migration can be defined as crossing the boundary of a political or administrative unit for a certain minimum period.},
  language  = {en}
}