@article{TM2_2021_XXIV_2_a1,
     author = {Borislav Lazarov and Dimitar Dimitrov and Martin Dimitrov and Gergana Peeva},
     title = {Outcomes from an experimental teaching - on two types of isoptics for curves with asymptotes},
     journal = {The Teaching of Mathematics},
     pages = {76 },
     publisher = {mathdoc},
     volume = {XXIV},
     number = {2},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TM2_2021_XXIV_2_a1/}
}