• Factor analysis
• Analytical boundary curve construction
• Rank deficiency problems

2025

• M. Beese, T. Andersons, M. Sawall, H. Abdollahi, K. Neymeyr,
  Can one recover the underlying spectral data matrix from a given Borgen plot?
  J. Chemom.  39(3), e70016 (2025),
  https://doi.org/10.1002/cem.70016

2024

• T. Andersons, M. Sawall, M. Beese, C. Kubis, K. Neymeyr,
  On hidden rank deficiency in MCR problems
  J. Chemom. 38(12), e3608 (2024).
  https://doi.org/10.1002/cem.3608
   
• M. Sawall,  C. Kubis,  B. Leidecker, L. Prestin, T. Andersons, M. Beese, J. Hellwig, R. Franke, A. Börner, K. Neymeyr,
  An automated Peak Group Analysis for vibrational spectra analysis,
  Chemom. Intell. Lab. Syst.  254, 105234 (2024).
  https://doi.org/10.1016/j.chemolab.2024.105234
   
• M. Beese, T. Andersons, M. Sawall, C. Ruckebusch, A. Gómez-Sánchez, R. Francke, A. Prudlik, R. Franke, K. Neymeyr,
  On the factor ambiguity of MCR problems for blockwise incomplete data sets
  Chemom. Intell. Lab. Syst. 249, 105134 (2024)
  https://doi.org/10.1016/j.chemolab.2024.105134
   
• K. Neymeyr, M. Sawall, T. Andersons,
  A note on rank-deficiency and numerical modeling,
  J. Chemom. 38(8), e3550 (2024).
  https://doi.org/10.1002/cem.3550

2023

• M. Sawall, T. Andersons, K. Neymeyr,
  On the Area of Feasible Solutions for rank-deficient problems: II. The geometric construction.
  Chemom. Intell. Lab. Syst. 235,  104782  (2023).  
  https://doi.org/10.1016/j.chemolab.2023.104782

2022

• T. Andersons, M. Sawall,, K. Neymeyr,
  Analytical enclosure of the set of solutions of the three-species multivariate curve resolution problem
  J. Math. Chem. 60, 1750-1780 (2022).
  https://doi.org/10.1007/s10910-022-01380-5
   
• M. Sawall, T. Andersons, H. Abdollahi, S. Khodadadi Karimvand, B. Hemmateenejad, K. Neymeyr,
  Calculation of lower and upper band boundaries for the feasible solutions of rank-deficient multivariate curve resolution problems. 
  Chemom. Intell. Lab. Syst. 226, 104577 (2022).
  https://doi.org/10.1016/j.chemolab.2022.104577