@article{10_4064_am37_4_1,
     author = {Teresa Ledwina and Jan Mielniczuk},
     title = {Variance function estimation via
 model selection},
     journal = {Applicationes Mathematicae},
     pages = {387--411},
     publisher = {mathdoc},
     volume = {37},
     number = {4},
     year = {2010},
     doi = {10.4064/am37-4-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am37-4-1/}
}