@article{10_4064_am_22_1_123_138,
     author = {L. Gajek and A. Lenic},
     title = {An approximate necessary condition for the optimal bandwidth selector in kernel density estimation},
     journal = {Applicationes Mathematicae},
     pages = {123--138},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {1993},
     doi = {10.4064/am-22-1-123-138},
     zbl = {0789.62028},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-22-1-123-138/}
}