The stellar and substellar mass function in central region of the old open cluster Praesepe from deep LBT observationsW. Wang, S. Boudreault, J. Caballero, C.A.L. Bailer-Jones, B. Goldman and Th. HenningEPJ Web of Conferences, 16 (2011) 06011DOI: https://doi.org/10.1051/epjconf/20111606011