N. Wambeck translated by G. Cala Gaitán and G. Bernal G. : Sypnosis of the Oil Palm Process. 2005. FEDEPALMA.
G. Cala Gaitán and G. Bernal G. : Modern Processes in Palm Oil Mills. 2008. FEDEPALMA.
Journal Articles
G. Cala Gaitán. Handbook of Palm Oil Mills, 1973.
G. Cala Gaitán. Energy Application for the Empty Bunches, 1995.
G. Cala Gaitán. The Strategic Partnership in the Palm Development, 1998.
G. Cala Gaitán. Agricultural and Industrial Process of Palm Oil, 2000.
G. Cala Gaitán. Industrialization and Prospects for the Palm Oil, 2001.
