Reference external js library in ASP CORE 2 WITHOUT .angular-cli.json

I am using ASPNET CORE 2 with Angular 4 in VS 2017 and by default there is no .Angular-cli.json file created which usually has a scripts node. My project uses web pack. I have an external javascript library (Not downloaded via) npm which has to be used in typescript. In what file or Where do I place the reference to the js library so it can be used and found in typescript and angular. How do I do this with WEBPACK?

thanks