@article{AIF_2004__54_2_317_0,
     author = {Maz'ya, Vladimir and Verbitsky, Igor},
     title = {The form boundedness criterion for the relativistic {Schr\"odinger} operator},
     journal = {Annales de l'Institut Fourier},
     pages = {317--339},
     publisher = {Association des Annales de l{\textquoteright}institut Fourier},
     volume = {54},
     number = {2},
     year = {2004},
     doi = {10.5802/aif.2020},
     zbl = {02123569},
     language = {en},
     url = {http://www.numdam.org/articles/10.5802/aif.2020/}
}