• https://cdn.bootcdn.net/ajax/libs/sigma.js/1.0.3/sigma.js
• https://cdn.bootcdn.net/ajax/libs/sigma.js/1.0.3/sigma.min.js
• https://cdn.bootcdn.net/ajax/libs/sigma.js/1.0.3/sigma.require.js
• https://cdn.bootcdn.net/ajax/libs/sigma.js/1.0.3/sigma.require.min.js