Long-term photometric observations of pre-main sequence objects in the field of North America/Pelican NebulaI. Poljančić Beljan, R. Jurdana-Šepić, E. H. Semkov, S. Ibryamov, S. P. Peneva and M. K. TsvetkovA&A, 568 (2014) A49DOI: https://doi.org/10.1051/0004-6361/201322965
