Gurkan, U., Fan, Y., Xu, F., Erkmen, B., Urkac, E., Parlakgul, G., Bernstein, J., Xing, W., Boyden, E., & Demirci, U. (2013). Simple precision creation of digitally specified, spatially heterogeneous, engineered tissue architectures. Advanced Materials, 25 (8), 1192–1198.