É. Barna

Lycopene content and colour of ripening tomatoes as affected by environmental conditions

Lajos Helyes, Zoltán Pék, L. Helyes, 2006 .

Appreciation and analysis of lycopene content of tomato

L. Helyes, K. Réti, A. Lugasi, 2003 .

Effects of the growing methods and conditions on the lycopene content of tomato fruits

L. Helyes, Z. Pék, A. Lugasi, 2003 .

Liquid chromatographic analysis of vitamin B6 in reconstituted infant formula: collaborative study.

D. Woollard, R. Eitenmiller, J. Devries, 2005, Journal of AOAC International.

Lycopene content of foods and lycopene intake in two groups of the Hungarian population

A. Lugasi, Sára Brandt, É. Barna, 2003 .