Wold, S., Jonsson, J., Sjorstrom, M., Sandberg, M., & Rannar, S. (1993).
DNA and peptide sequences and chemical processes multivariately modelled
by principal component analysis and partial least-squares projections
to latent structures.
Analytica chimica acta, 277(2), 239--253.
Sjostrom, M., Rannar, S., & Wieslander, A. (1995).
Polypeptide sequence property relationships in Escherichia coli
based on auto cross covariances.
Chemometrics and intelligent laboratory systems, 29(2), 295--305.