o The addtoenv() function was inspired by the as.proto.list() function of package proto.

o Gabor Grothendiek helped during testing and gave useful hints for code improvement.

o Thanks to to Woodrow Setzer for providing the odesolve package and to the R Core Team
  for maintainig the superior R software.

o Many thanks to Karsten Rinke for hard test examples (distributed separately) and 
  for proofreading.

o Many thanks to Renť Sachse for suggestions and working solutions (distributed separately)

o Many thanks to the participants of the Modlim3 workshop for creative playing with simecol

o Many thanks to two anonymous reviewers for their constructive criticism. 
  I know that reviewing software is hard work, so many many thanks!