Koukoulakis P., Papadopoulos A., 2007. Problem soils and their improvement. Publisher Stamoulis, pp.412 ISBN: 9603516937 (in Greek)

Koukoulakis P., Papadopoulos A., 2003. Interpretation of leaf analysis. Publisher Stamoulis, pp.516 ISBN: 9603514403 (in Greek)

Koukoulakis P., Papadopoulos A., 2001. Interpretation of soil analysis. Publisher Stamoulis, pp.372 ISBN: 9603513423 (in Greek)

Koukoulakis P., Simonis A., Gertsis A., 2000. Soil organic matter - The problem of Greek soils. Publisher Stamoulis, pp.492 ISBN: 9603513105 (in Greek)

Chatzistathis Th., 2014. Micronutrient deficiency in soils and plants. Publisher Bentham E-books, pp.205 ISBN: 9781608059355 (in English)

Koukoulakis P., Kalavrouziotis I., Kokkinos P., 2017. Geochemical behaviour of heavy metals in the environment. Publisher Tziola, pp.552 ISBN: 9604187104 (in Greek)

Stylianidis D., Simonis A., Syrgiannidis G., 2002. Nutrition and fertilization in pomology trees: Deficiencies, toxicities and fruit physiological disorders. Publisher Stamoulis, pp.676 ISBN: 9603513776 (in Greek)

Gikas P. et al., 2011. Water for the islands. Publisher Hellenic Society for the Environment and Cultural Heritage, pp.94 ISBN: 9789609955027 (in Greek)

Koukoulakis P., 1994. Potassium facts. Publisher Stamoulis, pp.116 ISBN: 9603120391 (in Greek)

Iatrou M., Psoma P., Mpountla A., 2013. Laboratory guidelines for soil analysis. Internal ISWR publication, Eds: Papadopoulos A., Papadopoulos F., pp.170 (in Greek)

Metaxa E., Tziachris P., 2016. Statistics manual: Controlling various hypotheses of statistical tests using SPSS v.22, Internal ISWR Publication, pp.30 (in Greek)