no. 2
Linear equations in members of recurrence sequences
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 20 (1993) no. 2, pp. 219-246. 
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     author = {Schlickewei, H. P. and Schmidt, W. M.},
     title = {Linear equations in members of recurrence sequences},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {219--246},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 20},
     number = {2},
     year = {1993},
     mrnumber = {1233637},
     zbl = {0803.11010},
     language = {en},
     url = {http://archive.numdam.org/item/ASNSP_1993_4_20_2_219_0/}
}
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Schlickewei, H. P.; Schmidt, W. M. Linear equations in members of recurrence sequences. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 20 (1993) no. 2, pp. 219-246. http://archive.numdam.org/item/ASNSP_1993_4_20_2_219_0/

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