The natbib bbl cite processor with numeric citations

A single key cite:&boes-2016-neural-networ.

another single cite:&boes-2017-neural-networ

Two keys cite:&boes-2016-neural-networ;&boes-2017-neural-networ.

Three keys cite:&boes-2016-neural-networ;&xu-2017-first-princ;&boes-2017-neural-networ that should be merged.

Four keys, with last three merged cite:&boes-2016-neural-networ;&xu-2017-first-princ;&boes-2017-model-segreg;&geng-2017-first-princ.

A book cite:&Dominik201408.

Misc entry cite:&jkitchin76:online.

bibliographystyle:unsrtnat bibliography:../org-ref.bib

build

(require 'org-ref-natbib-bbl-citeproc)
(let ((org-export-before-parsing-hook '(org-ref-bbl-preprocess)))
  (org-org-export-as-org))

(let ((org-export-before-parsing-hook '(org-ref-bbl-preprocess)))
  (org-open-file (org-html-export-to-html)))