Reconstruction of the muon production depth with ground array data based on the TTC (Time-Track Complementarity) approachM. Ambrosio, C. Aramo, M. Cilmo, R. Colalillo, F. Guarino and L. ValoreEPJ Web of Conferences, 53 (2013) 08003DOI: https://doi.org/10.1051/epjconf/20135308003