参考文献

Usher III Initiative; Bürli, Roland Werner; Krishna Esmieu, William Rameshchandra; Lock, Christopher James; Malagu, Karine Fabienne; Owens, Andrew Pate; Harte, William E. Patent: US2014/121205 A1, 2014 ; Location in patent: Paragraph 0048; 0077; 0078 ;