1. Computer aided design for lift systems;Barney,1974
2. A survey of passenger traffic in two office buildings;Courtney;Building Research Establishment Current Paper 67/74,1974
3. The application of probabilistic methods to building design;Green,1975
4. Electric Lifts;Phillips,1966
5. The probable number of stops made by an elevator;Bassett Jones;Gen. Elec. Rev.,1923