diff --git a/src/main/DirectedEdge.ts b/src/main/DirectedEdge.ts
index 8850afe..db19bf4 100644
--- a/src/main/DirectedEdge.ts
+++ b/src/main/DirectedEdge.ts
@@ -22,7 +22,7 @@ export class DirectedEdge extends Edge {
    * @param vertexOne
    * @param vertexTwo
    */
-  public constructor(vertexOne: IVertex, vertexTwo: IVertex) {
-    super(vertexOne, vertexTwo);
+  public constructor(vertexOne: IVertex, vertexTwo: IVertex, name: string = undefined, weightLabel: string = undefined, isDirected:boolean = true) {
+    super(vertexOne, vertexTwo, name, weightLabel, isDirected);
   }
 }
\ No newline at end of file
diff --git a/src/main/DirectedGraph.ts b/src/main/DirectedGraph.ts
index aa33798..bd960e0 100644
--- a/src/main/DirectedGraph.ts
+++ b/src/main/DirectedGraph.ts
@@ -6,6 +6,7 @@ import {UndirectedGraph} from "./UndirectedGraph";
 import {SccBuilder} from "../algorithms/SccBuilder";
 import {IGraph} from "../types/IGraph";
 import {IEdge} from "../types/IEdge";
+import {forEach} from "lodash";
 
 /**
  * Directed graph
@@ -16,8 +17,8 @@ export class DirectedGraph extends Graph<Vertex, DirectedEdge> {
   /**
    * @constructor
    */
-  public constructor() {
-    super(true);
+  public constructor(directed: boolean = true) {
+    super(directed);
   }
 
   /**
@@ -26,8 +27,24 @@ export class DirectedGraph extends Graph<Vertex, DirectedEdge> {
    * @param vertexTwo
    * @returns {DirectedEdge}
    */
-  public getEdge(vertexOne: IVertex, vertexTwo: IVertex): DirectedEdge[] {
-    return this.edges.filter(a => a.vertexTwo.equals(vertexTwo) && a.vertexOne.equals(vertexOne));
+  public getEdge(vertexOne: IVertex, vertexTwo: IVertex): DirectedEdge[]{
+
+    let e:DirectedEdge;
+
+    let i:number=0;
+    let result:DirectedEdge[] =[];
+
+    for (i=0; i<this.edges.length; i++)
+    {
+      if (this.edges[i].vertexOne.name === vertexOne.name && this.edges[i].vertexTwo.name ===vertexTwo.name)
+      {
+        result.push(new DirectedEdge(this.edges[i].vertexOne, this.edges[i].vertexTwo, this.edges[i].name, this.edges[i].weightLabel, this.edges[i].isDirected));
+      }
+    }
+
+    // return this.edges.filter(a => a.vertexTwo.name === vertexTwo.name && a.vertexOne.name == vertexOne.name);
+
+     return result;
   }
 
   public buildSCC(): IGraph<IVertex, IEdge>[] {
@@ -39,13 +56,13 @@ export class DirectedGraph extends Graph<Vertex, DirectedEdge> {
    * @returns {DirectedGraph}
    */
   public clone(): DirectedGraph {
-    const clone = new DirectedGraph();
+    const clone = new DirectedGraph(true);
     this.vertices.forEach(v => clone.addVertex(v.clone()));
     for (const edge of this.edges)
     {
-      const v1 = clone.vertices.filter(edge.vertexOne.equals)[0]; //Single?
-      const v2 = clone.vertices.filter(edge.vertexTwo.equals)[0];
-      clone.addEdge(new DirectedEdge(v1, v2));
+      // const v1 = clone.vertices.filter(edge.vertexOne.equals)[0]; //Single?
+      // const v2 = clone.vertices.filter(edge.vertexTwo.equals)[0];
+      clone.addEdge(new DirectedEdge(edge.vertexOne, edge.vertexTwo, edge.name, edge.weightLabel, edge.isDirected));
     }
 
     return clone;
diff --git a/src/main/Graph.ts b/src/main/Graph.ts
index 9da4945..91bd80f 100644
--- a/src/main/Graph.ts
+++ b/src/main/Graph.ts
@@ -9,7 +9,7 @@ import {UndirectedGraph} from "./UndirectedGraph";
 
 /** @classdesc
  * Graph implementation of the IGraph interface */
-export class Graph<T extends Vertex, K extends Edge> implements IGraph<T,K> {
+export class Graph<T extends Vertex, K extends IEdge> implements IGraph<T,K> {
   /** @property
    *  @private
    * Mark shows whether graph edges are directed or not */
@@ -346,7 +346,7 @@ export class Graph<T extends Vertex, K extends Edge> implements IGraph<T,K> {
    * Get vertex's degree
    */
   public getVertexDegree(vertex: Vertex): number {
-    return this.edges.filter((e: Edge) => (e.vertexOne === vertex) || (e.vertexTwo === vertex)).length;
+    return this.edges.filter((e: IEdge) => (e.vertexOne === vertex) || (e.vertexTwo === vertex)).length;
   }
 
   /**