@article{10_4064_aa150_2_2,
     author = {Hao Pan},
     title = {Lehmer-type congruences for
 lacunary harmonic sums modulo $p^2$},
     journal = {Acta Arithmetica},
     pages = {115--127},
     publisher = {mathdoc},
     volume = {150},
     number = {2},
     year = {2011},
     doi = {10.4064/aa150-2-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa150-2-2/}
}