• https://cdn.bootcdn.net/ajax/libs/sigma.js/2.0.0-alpha19/sigma-graphology.js
• https://cdn.bootcdn.net/ajax/libs/sigma.js/2.0.0-alpha19/sigma-graphology.min.js
• https://cdn.bootcdn.net/ajax/libs/sigma.js/2.0.0-alpha19/sigma.js
• https://cdn.bootcdn.net/ajax/libs/sigma.js/2.0.0-alpha19/sigma.min.js