@article{Magnucki:1999,
  author  = "K. Magnucki and W. Szyc",
  title   = "On stability problems of pressure vessel ellipsoidal heads",
  journal = "Archive of Mechanical Engineering",
  volume  = "Vol. 46",
  number  = "no 1",
  pages   = "43--55",
  year    = "1999",
}