An Automatic Regularization Method: An Application for 3-D X-Ray Micro-CT Reconstruction Using Sparse Data. - Zenith Purisha; Sakari S. Karhula; Juuso H. Ketola; Juho Rimpelainen; Miika T. Nieminen; Simo Saarakkala; Heikki Kroger; Samuli Siltanen (IEEE Trans. Medical Imaging, 2019)