Add missing DOIs

Author: remlapmot

vignettes/bibliography.bib

@@ -5,6 +5,7 @@ @Article{balke-jasa-1997
   Number                   = {439},
   Pages                    = {1172--1176},
   Volume                   = {92},
+  Doi                      = {10.1080/01621459.1997.10474074},
   Journal                  = {Journal of the American Statistical Association}
 }
 
@@ -14,6 +15,7 @@ @Article{palmer-sj-2011
   Year                     = {2011},
   Number                   = {3},
   Pages                    = {345--367},
+  Doi                      = {10.1177/1536867x1101100302},
   Url                      = {https://www.stata-journal.com/article.html?article=st0232},
   Volume                   = {11},
   Address                  = {College Station, TX},
@@ -28,6 +30,7 @@ @Article{meleady-ajcn-2003
   Number                   = {1},
   Pages                    = {63--70},
   Volume                   = {77},
+  Doi                      = {10.1093/ajcn/77.1.63},
   Journal                  = {The American Journal of Clinical Nutrition}
 }