References
- Bertelli J. D., et al. J. Arch. Ital. Patl. Clin. Tumor 1968; 11: 475
- Cánovas-Díaz M., Howell J. A. Biotechnol. Bioeng. 1987; 30: 289
- Morrow R. M., et al. Biotechnology and Bioengineering 1975; 17: 895
- Schuwartz R. S. Nature 1969; 224: 275