[1] G. Popescu. Quantitative Phase Imaging of Cells and Tissues(2011).
[15] K. Lee, Y. Park. Quantitative phase imaging unit. Opt. Lett., 39, 3630-3633(2014).
[28] M. T. Postek, A. Vladar, B. Ming, B. Benjamin. Documentation for reference material (RM) 8820: a versatile, multipurpose dimensional metrology calibration standard for scanned particle beam, scanned probe and optical microscopy(2014).