Online fully automated SPE-HPLC-MS/MS determination of ceftiofur in bovine milk samples employing a silica-anchored ionic liquid as sorbent - Ferreira, Débora Cecatto; Toffoli, Ana Lúcia de; Maciel, Edvaldo Vasconcelos Soares; Lanças, Fernando Mauro (Electrophoresis, 2018)