Brazilian propolis:: seasonal variation of the prenylated p-coumaric acids and antimicrobial activity - Jorge, R.; Furtado, Niege Araçari Jacometti Cardoso; Sousa, João Paulo Barreto de; Silva Filho, Ademar Alves da; Gregório Junior, L. E.; Martins, Carlos Henrique Gomes; Soares, Ademilson Espencer Egea; Bastos, Jairo Kenupp; Cunha, Wilson Roberto; Silva, M. L. A. (Pharmaceutical Biology, 2008)