@article{TRSPY_1984_163_a34,
     author = {T. Tatuzawa},
     title = {On some formulae in volving $L(1,\chi)$ and a~relating problems},
     journal = {Informatics and Automation},
     pages = {217--225},
     publisher = {mathdoc},
     volume = {163},
     year = {1984},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1984_163_a34/}
}