1. Bellmann R (1958) On a routing problem. Quart Appl Math 16:87–90
2. Carson WW, Studier D, Lysons HH (1971) Running skyline design with a desk-top computer/plotter. U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, Portland, OR, USA. PNW-153, p 21
3. Chung W, Sessions J (2003) A computerized method for determining cable logging feasibility using a DEM. Council of Forest Engineering, Bar Harbor, ME, USA
4. Findeis R (1923) Rechnerische Grundlagen des Baues von Drahtseilbahnen. Wien, Deuticke
5. Forsythe GE, Malcolm MA, Moler CB (1976) Computer methods for mathematical computations. Prentice-Hall, Englewood