@article{DMPS_2014_34_1-2_a10,
     author = {Grz\k{a}dziel, Mariusz and Michalski, Andrzej},
     title = {A note on the existence of the maximum likelihood estimate in variance components models},
     journal = {Discussiones Mathematicae. Probability and Statistics},
     pages = {159--167},
     publisher = {mathdoc},
     volume = {34},
     number = {1-2},
     year = {2014},
     zbl = {1326.62153},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMPS_2014_34_1-2_a10/}
}