Pierce, G. J., Hastie, L. C., Guerra, Á., Thorpe, R. S., Howard, F. G., & Boyle, P. R. (1994). Morphometric variation in Loligoforbesi and Loligo vulgaris: Regional, seasonal, sex, maturity and worker differences.

Pierce, Graham J., Lee C. Hastie, Ángel Guerra, Roger S. Thorpe, F. Godfrey Howard, y Peter R. Boyle. Morphometric Variation in Loligoforbesi and Loligo Vulgaris: Regional, Seasonal, Sex, Maturity and Worker Differences. 1994.

Pierce, Graham J., et al. Morphometric Variation in Loligoforbesi and Loligo Vulgaris: Regional, Seasonal, Sex, Maturity and Worker Differences. 1994.