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Yugoslav Journal of Operations ResearchPublisher: Faculty of Organizational Sciences, BelgradeISSN: 0354-0243Issue: 29_3Date: 2019Journal Homepage Editorial BoardImpressum   Second-Order Symmetric Duality in Multiobjective Variational Problems 295 - 308 Geeta Sachdev, Khushboo Verma and T. R. Gulati   AbstractKeywords: Multiobjective Programming; Variational Problem; Second-Order Duality; Efficient Solutions; $\eta$-bonvexity/$\eta$-pseudobonvexity.MSC: 46N10; 52A41; 90C46; 49N15; 49M29DOI: 10.2298/YJOR180715019S On an Exact Penality Result and New Constraint Qualifications for Mathematical Programs With Vanishing Constraints 309 - 324 Triloki Nath and Abeka Khare   AbstractKeywords: Mathematical Programs with Vanishing Constraints; Enhanced Fritz John conditions; Constraint qualifications; Error boundMSC: 90C30; 49M05; 65K10DOI: 10.2298/YJOR180615018N Determining Fuzzy Distance Through Non-Self Fuzzy Contractions 325 - 335 Parbati Saha, Shantanu Guria and Binayak S. Choudhury   AbstractKeywords: Fuzzy Metric Spaces; Global Optimization; Pproximity Point; Non-Self $(\phi - \psi)$ - Proximal Contraction; Optimal Approximate Solution; Fuzzy P-property.MSC: 47H10; 54H25DOI: 10.2298/YJOR180515002S Multi-Objective Stochastic Transportation Problem Involving Three-Parameter Extreme Value Distribution 337 - 358 Mitali Madhumita Acharya, Adane Abebaw Gessesse, Rajashree Mishra and Srikumar Acharya   AbstractKeywords: Multi-Objective Programming; Stochastic Programming Problem; Transportation Problem; Extreme Value Distribution; $\epsilon$-Constraint MethodMSC: 90B06; 90C15; 90C29DOI: 10.2298/YJOR180615036A Variable Neighbourhood Search for Financial Derivative Problem 359 - 373 Nareyus I Lawrance Amaldass, Cormac Lucas and Nenad Mladenović   AbstractKeywords: Goal Programming problem; Contract for Difference; Equity; Metaheuristics; Variable Neighborhood SearchMSC: 90B06; 90C05; 90C08DOI: 10.2298/YJOR180515016L Bounds of the Stationary Distribution in M/G/1 Retrial Queue With Two-Way Communication and $n$ Types of Outgoing Calls 375 - 391 Lala Maghnia Alem, Mohamed Boualem and Djamil Aissani   AbstractKeywords: Retrial Queues; Outgoing Calls; Markov Chain; Stochastic Comparison; Simulation.MSC: 60K25; 60E15; 60K10DOI: 10.2298/YJOR180715012A Understanding Multi-Stage Diffusion Process in Presence of Attrition of Potential Market and Related Pricing Policy 393 - 413 Shakshi Singhal, Adarsh Anand and Ompal Singh   AbstractKeywords: Awareness; Adoption; Attrition; Disinterested potential customers; Dynamic price; Innovation diffusion modeling; Motivation; Optimal control theoryMSC: 90B85; 90C26DOI: 10.2298/YJOR180315001S Dynamic Analysis of the Efficiency of Research and Development Systems of South-European Countries 415 - 431 Predrag Mimović, Ana Krstić and Milena Jakšić   AbstractKeywords: Research and Development; Performance; Efficiency; Economic Growth; Data Envelopment AnalysisMSC: C61; D80; O32DOI: 10.2298/YJOR180815013M

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