@article{PMF_1896_7_1_a6,
     author = {Biernacki, Wiktor},
     title = {Prosty spos\'ob demonstrowania do\'swiadcze\'n {Hertza} ze zwierciad{\l}ami},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {144--149},
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {1896},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/item/PMF_1896_7_1_a6/}
}