1. 30Mei1 - 73Sir1;Nb-H - Nb-Zr, Nd - Np
2. Nb-Ti;Nb-H - Nb-Zr, Nd - Np
3. Nb-Ta;Nb-H - Nb-Zr, Nd - Np
4. References;Landolt-Börnstein - Group III Condensed Matter
5. Scientific samples of Ti-Nb alloys and compounds;Landolt-Börnstein - Group III Condensed Matter