Direct impacts of off-hour deliveries on urban freight emissions - Holguín-Veras, José; Encarnacion Rivera, Trilce Marie; González-Calderón, Carlos Alberto; Winebrake, James; Wang, Cara; Kyle, Sofia; Herazo-Padilla, Nilson; Kalahasthi, Lokesh; Adarme Jaimes, Wilson; Cantillo, Víctor; Garrido, Rodrigo (Transportation Research Part D: Transport and Environment, 2018)