title: [Formation of observing line direction in the gradient optic systems of superfine medical endoscopes].
authors.forename: S Iu
authors.initials: SIu
authors.lastname: D'iakonov
authors.forename: A I
authors.initials: AI
authors.lastname: Kats
mesh_terms: D019723:Endoscopes; D006801:Humans; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation*