Nunes, P ; Moreira, J.F ; Martins, M.C Fourth European Workshop on Standardised Procedure for the Inspection of Sprayers in Europe - SPISE 4 - -- 978-3-930037-93-3 -- 10.5073/JKA.2012.439.000 -- http://pub.jki.bund.de/index.php/JKA/article/download/2379/2724.
,
2013