1. Siker, E S, Foldes F. F, Pahk, N M, &Swebdlow, M. Nisentil (1, 3-dimethyl-4-phenyl-4-propionoxy Piperidine). A New Supplement for Nitrous Oxide-Oxygen Thiopentone (Pentothal Sodium) Anaesthesia. Brit J Anaesth.,26: 405–410 (1954).
2. Foldes, F. F., Swerdlow, M, &Siker, E S. The Enfluence of 1-3-hydroxy-N-allyl-morphrnan Tartrate (Levallorphan Tartrate) on the Respiratory Effects of 1, 3-dunethyl-4-phenyl-4-propionoxy Piperidine Hydrochlonde (Nisentil Hydrochloride) in Man. J. Pharmacol. & Exper. Therap,113: 21 (1955).
3. Swerdlow, M, Foldes, F. F., & Siker, E. S. The Effects of Nisentil® Hydrochlonde (Alphaprodine Hydrochlonde) and Levallorphan Tartrate on Respiration. Am J M. Sc. (in press).
4. Foldes, F F, Swerdlow, M, Lipschttz, E, Weber, G, &Pirk, L. A. The Combined Use of Nisentil® Hydrochlonde and Levallorphan Tartrate for the Supplementation of Nitrous Oxide-Oxygen Anaesthesia Can Anaesth Soc. J2. 362 (1955)
5. Foldes, F. F., Lipschttz, E, Weber, G, Swerdlow, M. &Pirk, L. A. The Use of Alphaprodine (Nisentil®) Hydrochlonde and Levallorphan Tartrate for Supplementation of Nitrous Oxide-Oxygen Anesthesia Read before the Section on Anesthesiology at the 104th Annual Meeting of the American Medical Association, Atlantic City, New Jersey, June 8, 1955.