Frank, Joachim (1975). „Averaging of low-exposure electron micrographs of non-periodic objects”. Ultramicroscopy. 1 (2): 159—162. PMID1236029. doi:10.1016/s0304-3991(75)80020-9.
Frank, Joachim (1975). „Averaging of low-exposure electron micrographs of non-periodic objects”. Ultramicroscopy. 1 (2): 159—162. PMID1236029. doi:10.1016/s0304-3991(75)80020-9.