@article{MV_1977_29_1_a18,
     author = {K. K. Ponomarev},
     title = {Dve modeli zada\v{c}i kurimoj sigarety},
     journal = {Matemati\v{c}ki vesnik},
     pages = {165 },
     year = {1977},
     volume = {29},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/MV_1977_29_1_a18/}
}