@incollection{MSMF_1980_2_2__35_0,
     author = {Dobrowolski, E.},
     title = {On a question of {Lehmer}},
     booktitle = {Fonctions ab\'eliennes et nombres transcendants},
     editor = {Bertrand, Daniel and Waldschmidt, Michel},
     series = {M\'emoires de la Soci\'et\'e Math\'ematique de France},
     pages = {35--39},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {2},
     year = {1980},
     doi = {10.24033/msmf.277},
     mrnumber = {82h:12003},
     zbl = {0448.12001},
     url = {http://www.numdam.org/articles/10.24033/msmf.277/}
}