H.‐P. Janett

Metabolite gradients and carbohydrate translocation in rosette leaves of CAM and C3 bromeliads.

M. Popp, U. Lüttge, E. Medina, 2003, The New phytologist.

Daily fluctuations of titratable acidity, content of organic acids (malate and citrate) and soluble sugars of varieties and wild relatives of Ananas comosus L. growing under natural tropical conditions

M. Popp, U. Lüttge, E. Medina, 1993 .