@article{article, title  = {{Analysis of topological information from defocused speckle photographs}},

 publisher = {{Elsevier}},

 url = {{}},

 year = {{1977}},

 month = {{2}},

 author = {{Gregory DA}},

 doi = {{10.1016/0030-3992(77)90042-1}},

 volume = {{9}},

 journal = {{Optics & Laser Technology}},

 issue = {{1}},

 pages = {{6-12}},

 note = {{Accessed on 2026/03/14}}}