Search for charged Higgs bosons: combined results using LEP dataALEPH Collaboration, DELPHI Collaboration, L3 Collaboration, OPAL Collaboration and The LEP working group for Higgs boson searchesEur. Phys. J. C, 73 7 (2013) 2463DOI: https://doi.org/10.1140/epjc/s10052-013-2463-1