@article{AUPO_2009__48_1_a0,
     author = {Borisov, Adrijan Varbanov and Spirova, Margarita Georgieva},
     title = {On the measurability of sets of pairs of intersecting nonisotropic straight lines of type beta in the simply isotropic~space},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {7--16},
     publisher = {mathdoc},
     volume = {48},
     number = {1},
     year = {2009},
     mrnumber = {2641943},
     zbl = {1203.53072},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_2009__48_1_a0/}
}