• Analysis of Sports, Tourism, and Spatial Data
• Business Forecasting Models
• Nonlinear Equations and Polynomials
• Interval Equations and Polynomials
• Global Optimization
• Problems Involving Uncertainty
• Interval Analysis Methods

J1. I.A. Nikas, and T.N. Grapsa. Bounding the zeros of an interval equation, Applied Mathematics and Computation, 213(2), pp. 466–478, 2009. [ScienceDirect ~ PrePrint]

J2. E.N. Malihoutsaki, I.A. Nikas, and T.N. Grapsa. Improved Newton’s method without direct function evaluations, Journal of Computational and Applied Mathematics, 227(1), pp. 206–212, 2009. [ScienceDirect ~ PrePrint]

J3. C.D. Nikolakakou, T.N. Grapsa, I.A. Nikas, and G.S. Androulakis. A sequential approach for unconstrained optimization via a partitioning technique, International Journal of Computer Mathematics, 92(4), pp. 722-741, 2015. [Taylor & Francis]

J4. An. Panagopoulos, Al. Panagopoulos, I. Nikas, and T. Grapsa. A Comparative Study on Tourism Demand in Region Western Greece and its Contiguous Regions, Archives of Economic History, 27(2), pp. 19-35, 2015. [Journal]

J5. Al. Panagopoulos, S. Malefaki, I.A. Nikas. Forecasting The Tourism Demand Using Time-Series – A Case Study On The Prefectures Of Western Greece, “Tourism Research Institute”, Journal of Tourism Research, 11(1), pp. 162-173, 2015. [Preprint]

J6. A. Koutras, A. Panagopoulos, and I. Nikas. Forecasting Tourism Demand Using Linear and Nonlinear Prediction Models, Academica Touristica, 9(1), pp. 85-98, 2016. [Journal]

J7. I. Poulaki and I.A. Nikas. Measuring tourist behavioral intentions after the first outbreak of COVID19 pandemic crisis. Prima facie evidence from the Greek market, International Journal of Tourism Cities, Vol. 7 No. 3, pp. 845-860, doi: 10.1108/IJTC-09-2020-0218, 2021 [Emerald Insight ~ In pdf]

J8. Μ. Αργυροπούλου, Ε. Κανταρτζή, Κ. Στοφόρος, Α. Παναγόπουλος, I. Νίκας και Ι. Πουλάκη (2021). Το έργο του Λευκάδιου Χερν στην εκπαίδευση και στον πολιτισμό: Ο Λευκάδιος Χερν ως έμπνευση για εκπαιδευτικές δράσεις. Δημιουργία Ψηφιακής Έκθεσης, Culture: Journal in Tourism, Culture, Art and Education, Vol. 1 No. 3, pp. 116-132. [In pdf]

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