@article{Alawdin:2015,
  author  = "P. Alawdin and K. Urbańska",
  title   = "Limit analysis of geometrically hardening composite steel-concrete systems",
  journal = "Civil and Environmental Engineering Reports",
  volume  = "No. 16",
  pages   = "5--23",
  year    = "2015",
  note    = "University of Zielona Góra Press, Zielona Góra",
}