Effect of Calcium on the in vitro Growth of Aechmea blanchetiana (Baker) L. B. Smith Plantlets - Kanashiro, Shoey; Ribeiro, Roberval de Cássia Salvador; Gonçalves, Antonio Natal; Demtrio, Valdemar Antonio; Jocys, Teresa; Tavares, Armando Reis (Journal of Plant Nutrition, 2009)