The reference list is severely misaligned with in-text citations.
Examples: [15] and [25] are cited for “Dienes” but both are Mustafa et al.;
[26] is cited as “De et al.” but is Vanneschi & Silva;
[2] is cited as “Ahmed et al.” but is Zeng & Martinez (2000);
[6] is cited as “Ahmed et al.” but is Zhang et al.;
[8] is cited as “Usman et al.” but is Jiang et al.;
[24] is cited as “Ain et al.” but is Hirsch (2005);
[27] is cited as “Schreiber” but is Jiang & Xue;
[28] is cited as “Ghani et al.” but is Katsaros et al.;
[29] is cited as “Moreira et al.” but is Goldenfeld & Woese.
In addition, [24] and [40] are duplicate entries of Hirsch (2005).