Figure 2: Distribution of papers selected by journals
Source : authors
It is emphasized that the periodicals: Procedia - Social and Behavioral
Sciences and Transportation Research Procedia are open access products
focusing entirely on publishing full sets of conference proceedings.
Thus, the greatest number of papers observed was, in a sense, expected.
Stage 2.3: extracting data and
information’
\label{stage-2.3-extracting-data-and-information}
Figure 3 illustrates the year of publication of all papers included in
this systematic literature review. In relation to the time span, there
was a concentration of publications in 2014 (10) and 2015 (9). It should
be noted that the number of publications in 2016 only considers papers
published until the month of July (date of the survey). This observation
may justify the smaller number of papers published (5) in that year.
No papers related to this theme were published in 2012. This result
corroborates with the premise adopted in this paper that the study of
the technologies related to the last mile delivery in urban areas is a
recent approach, and thus it ratifies the restriction of the search for
the last five years.