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@article{TUW-109555,
    author = {Pichler, Waltraud and Leeb, Walter},
    title = {Target-plane intensity approximation for apertured Gaussian beams applied to heterodyne backscattered lidar systems},
    journal = {Applied Optics},
    year = {1994},
    volume = {vol. 33},
    pages = {4761--4770}
}