ÇAKALLI, M. (2021) Non-Market Valuation of Agriculture, Pasture and Forest Lands affected by Public or Private Investments: Scientific Monograph. Nova Science Publishers

LEPAJA, L., KULLAJ, E. and K. LEPAJA (2019) Deficit Irrigation of Pome and Small Fruits (Pear, Raspberry, Blueberry): A Scientific Monograph. 134 pg Nova Science Publishers, USA.

KULLAJ, E. (2017) Rootstocks for Improved Postharvest Quality of Fruits: Recent Advances. In Siddiqui, W. ed. Preharvest Modulation of Postharvest Fruit and Vegetable Quality. 189-207.  Academic Press (Elsevier) https://doi.org/10.1016/B978-0-12-809807-3.00017-2

KULLAJ, E. (2016) New insights on postharvest ecophysiology of fresh horticultural crops. In Siddiqui, W. ed. Eco-Friendly Technology for Postharvest Produce Quality. Academic Press (Elsevier) http://dx.doi.org/10.1016/B978-0-12-804313-4.00001-3

KULLAJ, E. (2014) Following walnut footprints in Albania. In: Avanzato et al (Eds.) Following Walnut Footprints (Juglans regia L) – Cultivation and Culture, Folklore and History, Traditions and Uses. Scripta Horticulturae No.17,  ISBN 978-90-6605-632-9

KULLAJ, E. and M. CAKALLI (2013). Albanian Agriculture: Analyzing the Past to Decide for the Future. In Pillarisetti et al. (Eds.), Multifunctional Agriculture, Ecology and Food Security: International Perspectives. Nova Science Publishers ISBN 978-1-62618-294-3

CAKALLI, M. (2013) Apraising the Externalities of Agriculture and Related Activities – Study on Lake Skadar in Albania. Lambert Academic Publishing. ISBN 978-3-659-45346-5

KULLAJ, E., SUSAJ, L. and A. ÇAKALLI (2013). Last home for the wild grapevine. Characterization and conservation of Vitis sylvestris in Albania. AV Akademikerverlag GmbH & Co. KG., ISBN: 978-3-659-31918-1

KULLAJ, E. (2012) Following olive footprints in Albania. In: El Kholi et al (Eds.) Following Olive Footprints (Olea europaea L.) – Cultivation and Culture, Folklore and History, Tradition and Uses. Scripta Horticulturae No.13, ISBN 978 90 6605 734 0

KULLAJ, E. and M. ÇAKALLI (2011). Sustainability of the medicinal and aromatic plants sector – socio economic value and policies for Albania. Lambert Academic Publishing, Germany ISSN. 978-3-8443-3170