create filename from input string

const year: number = 2018;
const author: string = 'Woehrer Zdun';
const title: string = 'Smart Contracts: Security Patterns in the Ethereum Ecosystem and Solidity';

const literature : string = `${year} - ${author} - ${title}`;

console.log(literature.toLocaleLowerCase('de-DE').replace(/[ ]+/g, '_').replace(/[.:]+/, ''));