@article{Korir2015, author = "George Korir and Manu Prakash", title = "{Integrated punch card controlled normally-closed valves.}", year = "2015", month = "12", url = "https://plos.figshare.com/articles/figure/_Integrated_punch_card_controlled_normally_closed_valves_/1325877", doi = "10.1371/journal.pone.0115993.g004" }