72 non accessible url's in our lyx-files

[Pavel Sanda]

"ftp://ftp.springer.de/pub/tex/latex/llncs/latex2e"

https://ctan.org/pkg/llncs

Also it seems that Springer officially supports templates at overleaf
https://www.springer.com/gp/computer-science/lncs/new-latex-templates-available/15634678?srsltid=AfmBOopsheDLJzQs-cjEb1ZLufR-_hGLDpHL8CVOAfRcDL8PoSdYAv-c
so one could use
https://www.overleaf.com/latex/templates/springer-lecture-notes-in-computer-science/kzwwpvhwnvfj#.WtR5Hy5ua71

and for 
"ftp://ftp.springer.de/pub/tex/latex/svjour3/bibtex"
https://cs.overleaf.com/latex/templates/a-general-template-file-for-the-latex-package-svjour3-for-springer-journals/pbbwqhxxvtbp