Manual-observing procedure: an alternative to the investigation of stimulus control and equivalence classes in matching-to-sample - Soares Filho, Paulo Sergio Dillon; Carvalho, Lígia Mosolino de; Hamasaki, Eliana Isabel de Moraes; Campos, Heloísa Cursi; Perez, William Ferreira; Arntzen, Erik; Tomanari, Gerson Yukio (The Psychological Record, 2019)