@article{10_4064_sm209_3_5,
     author = {Kamil Kaleta},
     title = {Spectral gap lower bound for the one-dimensional fractional
 {Schr\"odinger} operator in the interval},
     journal = {Studia Mathematica},
     pages = {267--287},
     year = {2012},
     volume = {209},
     number = {3},
     doi = {10.4064/sm209-3-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm209-3-5/}
}