Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/36
Is Reference of Duffing-Gleichung-de#Sense
Equazione di Duffing-it#Sense
Ecuación de Duffing-es#Sense
Εξίσωση Duffing-el#Sense
Duffing's equation-en#Sense
Équation de Duffing-fr#Sense