some delphi reference to procedure (parameterlist); reference to function (parameterlist): returntype; Calling Procedures and Functions (Delphi)

 https://www.cross-kpk.ru/ims/15/base_m3_lek_11.htm

http://programkin.blogspot.com/2012/08/7-canvas-canvas-delphi.html

 https://alphomega.developpez.com/Agregats/tutoriel/

https://www.hianoto.net/ver1/projects/epascal/ch06proc.htm 

https://delphi.extradocs.net/fr/formation/tutoriels/mon-premier-programme-avec-delphi

https://delphi.developpez.com/cours/sgbd/article/

http://gr66.free.fr/delphi/prog1.html

https://www.marcocantu.com/epascal/English/

https://www.thoughtco.com/function-or-procedure-as-parameter-1057606

https://www.thedelphigeek.com/2008/01/make-better-delphi.html

http://interactiveasp.net/blogs/spgilmore/archive/2010/06/17/anonymous-methods-and-closures-in-delphi-2010.aspx

https://docwiki.embarcadero.com/RADStudio/Sydney/en/Anonymous_Methods_in_Delphi

https://docwiki.embarcadero.com/RADStudio/Sydney/en/Calling_Procedures_and_Functions_(Delphi)

https://docwiki.embarcadero.com/RADStudio/Sydney/en/Standard_Routines_and_Input-Output