TY - JOUR T1 - Service levels of highway toll plazas: the influence of factors on manual customer service JO - Production A1 - Lima, Josiane Palma A1 - InĂ¡cio, PatrĂ­cia Pereira Arantes A1 - Leal, Fabiano SN - 0103-6513 UL - 10.1590/0103-6513.20180032 VL - 29 Y1 - 2019 PB - Brasil ER -