We acknowledge the support received from:

• Research group: Mathematics for Computational Intelligence Systems – mcis.uca.es, Universidad de Cádiz (Spain)
• International Fuzzy Systems Association (IFSA)
• Széchenyi Istvan University (Győr, Hungary)
• Hungarian Fuzzy Association (Hungary)
• European Society for Fuzzy Logic and Technology (EUSFLAT)
• Centro de Investigación en Tecnologías de la Información y las Comunicaciones (CITIC)