update makefile, add some comments on biblatex

Makefile

@@ -1,16 +1,25 @@
-PDFS=thesis.pdf abstract-en.pdf abstract-cz.pdf
+NAME=thesis
+ABSTRACT=abstract
+REFS=refs.bib
+
+TEX=pdflatex #possibly switch to lualatex/xelatex
+BIB=bibtex #possibly switch to biber (remove backend=bibtex from biblatex opts)
+
+RMF=rm -f
+
+PDFS=$(NAME).pdf $(ABSTRACT)-en.pdf $(ABSTRACT)-cz.pdf
 
 all: $(PDFS)
 
-thesis.pdf: thesis.tex $(wildcard *.tex) refs.bib thesis.xmpdata
-	pdflatex $<
-	bibtex thesis
-	pdflatex $<
-	pdflatex $<
+$(NAME).pdf: $(wildcard *.tex) $(REFS) $(NAME).xmpdata
+	$(TEX) $(NAME)
+	$(BIB) $(NAME)
+	$(TEX) $(NAME)
+	$(TEX) $(NAME)
 
-abstract-%.pdf: abstract-%.tex abstract-%.xmpdata metadata.tex
-	pdflatex $<
+$(ABSTRACT)-%.pdf: $(ABSTRACT)-%.tex $(ABSTRACT)-%.xmpdata metadata.tex
+	$(TEX) $<
 
 clean:
-	rm -f *.log *.dvi *.aux *.toc *.lof *.lot *.out *.bbl *.blg *.xmpi
-	rm -f $(PDFS)
+	$(RMF) *.log *.dvi *.aux *.toc *.lof *.lot *.out *.bbl *.blg *.xmpi
+	$(RMF) $(PDFS)

thesis.tex

@@ -47,8 +47,25 @@
 
 % load bibliography tools
 \usepackage[backend=bibtex,natbib,style=numeric]{biblatex}
-% alternative with alphanumeric citations (more informative than plain numbers):
+% alternative with alphanumeric citations (more informative than numbers):
 %\usepackage[backend=bibtex,natbib,style=alphabetic]{biblatex}
+%
+% alternatives that conform to iso690
+% (iso690 is not formally required on MFF, but may help elsewhere):
+%\usepackage[backend=bibtex,natbib,style=iso-numeric]{biblatex}
+%\usepackage[backend=bibtex,natbib,style=iso-alphabetic]{biblatex}
+%
+% additional option choices:
+%  - add `giveninits=true` to typeset "E. A. Poe" instead of full Edgar Allan
+%  - add `maxnames=10` to limit (or loosen) the maximum number of authors in
+%    bibliography entry before shortening to `et al.` (useful when referring to
+%    book collections that may have hundreds of authors)
+%  - for additional flexibility (e.g. multiple reference sections, etc.),
+%    remove `backend=bibtex` and compile with `biber` instead of `bibtex` (see
+%    Makefile)
+%
+% possibly reverse the names of the authors with the default styles:
+%\DeclareNameAlias{default}{family-given}
 
 % load the file with bibliography entries
 \addbibresource{refs}