1. S. Wilkening and J. Cote, Light Met. 4, 534 (2007).
2. D.G. Brooks and V.L. Bullough, Light Met. 4, 516 (1984).
3. D. Molenaar and B.A. Sadler, Light Met. 2, 1263 (2014).
4. P.J. Rhedey and L. Castonguay, Light Met. 4, 1089 (1985).
5. M. Dupuis, Light Met. 2010 (2010).