1. Barker, J., El Saifi, A. F.: Studies in the respiratory and carbohydrate metabolism of plant tissues. I. Experimental studies of formation of CO2, lactic acid and other products in potato tubers under anaerobic conditions.—Proc. roy. Soc. B140: 362–384, 1952.
2. Barker, J., El Saifi, A. F.: Studies in the respiratory and carbohydrate metabolism of plant tissues. II. Interrelationship between the rates of production of CO2, of lactic acid and alcohol in potato tubers under anaerobic conditions.—Proc. roy. Soc. B140: 385–402, 1952.
3. Barker, J., El Saifi, A. F.: Studies in the respiratory and carbohydrate metabolism of plant tissues. III. Experimental studies of formation of CO2 and of the changes in lactic acid and other products in potato tubers in air following anaerobic conditions.—Proc. roy. Soc. B140: 508–522, 1952.
4. Barker, J., El Saifi, A. F.: Studies in the respiratory and carbohydrate metabolism of plant tissues. IV. The relation between the rate of CO2 production in potato tubers in air following anaerobic conditions, and the accompanying changes in lactic acid content and sugar concentration.— Proc. roy. Soc. B140: 522–555, 1952.
5. Barker, J., Mapson, L. W.: Studies in the respiratory and carbohydrate metabolism of plant tissues. VI. Analysis of the interrelationships between the rate of CO2 production and the changes in the contents of lactic acid, sucrose and of certain fraction of keto-acids in potato tubers in air following anaerobic conditions.—Proc. roy. Soc. B141: 338–361, 1953.