1. 1)a.Gerritsen, A. N. and Linde, J. O., Communications Kamerlingh Onnes Lab., Leiden No. 285c
2. The electrical resistance of silver-manganese alloys at low temperatures
3. 1)b.Gerritsen, A. N., Commun. No. 285d
4. The electrical resistance of silver-manganese alloys at low temperatures
5. 1)c.Gerritsen, A. N., and Linde, J. O., Commun. No. 290d