@ARTICLE{mueller+2023,
     author = {Christian M{\"u}ller and Helmut Pottmann},
     title = {The Geometry of Discrete Asymptotic-Geodesic 4-Webs in
              Isotropic 3-Space},
     journal = {Monatsh. Math.},
     fjournal = {Monatshefte f{\"u}r Mathematik},
     volume = {203},
     pages = {223-246},
     year = {2024},
     doi = {10.1007/s00605-023-01916-0},
}