This is BibTeX, Version 0.99d (TeX Live 2023/Debian)
Capacity: max_strings=200000, hash_size=200000, hash_prime=170003
The top-level auxiliary file: main.aux
The style file: plainnat.bst
Database file #1: references.bib
You've used 6 entries,
            2773 wiz_defined-function locations,
            625 strings with 5587 characters,
and the built_in function-call counts, 1966 in all, are:
= -- 164
> -- 82
< -- 6
+ -- 30
- -- 24
* -- 116
:= -- 324
add.period$ -- 19
call.type$ -- 6
change.case$ -- 24
chr.to.int$ -- 6
cite$ -- 12
duplicate$ -- 116
empty$ -- 187
format.name$ -- 34
if$ -- 405
int.to.chr$ -- 1
int.to.str$ -- 1
missing$ -- 8
newline$ -- 39
num.names$ -- 24
pop$ -- 57
preamble$ -- 1
purify$ -- 20
quote$ -- 0
skip$ -- 85
stack$ -- 0
substring$ -- 12
swap$ -- 6
text.length$ -- 0
text.prefix$ -- 0
top$ -- 0
type$ -- 56
warning$ -- 0
while$ -- 18
width$ -- 0
write$ -- 83