Souza, A. de A.L. et al. 2016. INITIAL DEVELOPMENT OF TWO VARIETY LETTUCE IN FUNCTION OF TWO TYPES OF SUBSTRATES AND GROUND COVER. Revista Brasileira de Engenharia de Biossistemas. 10, 3 (Sep. 2016), 316–326. DOI:https://doi.org/10.18011/bioeng2016v10n3p316-326.