diff --git a/cran-comments.md b/cran-comments.md
index 82a52cb..c180ee9 100644
--- a/cran-comments.md
+++ b/cran-comments.md
@@ -1 +1,4 @@
-This is a bug fix that removes irrelevant fortran code and fixes lto issues (as requested by CRAN)
+# This is a new release
+
+- The purpose of this release is to remove the binary linkage to
+  `nlmixr2est` (making the two packages more maintainable).
diff --git a/vignettes/lbfgsb3c.bib b/vignettes/lbfgsb3c.bib
index ac12cb7..f69fc58 100644
--- a/vignettes/lbfgsb3c.bib
+++ b/vignettes/lbfgsb3c.bib
@@ -181,7 +181,6 @@ @article{Gorn1960
  year = {1960},
  issn = {0001-0782},
  pages = {174--},
- url = {https://doi.acm.org/10.1145/367149.367173},
  doi = {10.1145/367149.367173},
  acmid = {367173},
  publisher = {ACM},
@@ -199,7 +198,6 @@ @article{Rader1961
  year = {1961},
  issn = {0001-0782},
  pages = {153--},
- url = {https://doi.acm.org/10.1145/366199.366275},
  doi = {10.1145/366199.366275},
  acmid = {366275},
  publisher = {ACM},
@@ -1433,8 +1431,7 @@ @Article{Hooke61
   Pages                    = {212-229},
   Volume                   = {8},
 
-  Bibsource                = {DBLP, http://dblp.uni-trier.de},
-  Ee                       = {https://doi.acm.org/10.1145/321062.321069}
+  Bibsource                = {DBLP, http://dblp.uni-trier.de}
 }
 
 @Manual{p-ROI,
@@ -2028,8 +2025,7 @@ @Article{Morales2011
   Articleno                = {7},
   Issue_date               = {November 2011},
   Numpages                 = {4},
-  Publisher                = {ACM},
-  Url                      = {https://doi.acm.org/10.1145/2049662.2049669}
+  Publisher                = {ACM}
 }
 
 @Article{More92linesearch,
@@ -2751,8 +2747,7 @@ @Article{Schnabel1985
   Numpages                 = {22},
   Owner                    = {john},
   Publisher                = {ACM},
-  Timestamp                = {2018.11.16},
-  Url                      = {https://doi.acm.org/10.1145/6187.6192}
+  Timestamp                = {2018.11.16}
 }
 
 @Article{Schnabel85,
@@ -2939,8 +2934,7 @@ @Article{Thacher1960
   Issue_date               = {Aug. 1960},
   Owner                    = {john},
   Publisher                = {ACM},
-  Timestamp                = {2018.08.29},
-  Url                      = {https://doi.acm.org/10.1145/367368.367385}
+  Timestamp                = {2018.08.29}
 }
 
 @Manual{p-Rglpk,
@@ -3119,8 +3113,7 @@ @Article{Wegstein1960
   Issue_date               = {June 1960},
   Owner                    = {john},
   Publisher                = {ACM},
-  Timestamp                = {2018.08.29},
-  Url                      = {https://doi.acm.org/10.1145/367297.367337}
+  Timestamp                = {2018.08.29}
 }
 
 @Article{Wenzel99,
@@ -3293,8 +3286,7 @@ @Article{Zhu1997LBFGS
   Issue_date               = {Dec. 1997},
   Keywords                 = {large-scale optimization, limited-memory method, nonlinear optimization, variable metric method},
   Numpages                 = {11},
-  Publisher                = {ACM},
-  Url                      = {https://doi.acm.org/10.1145/279232.279236}
+  Publisher                = {ACM}
 }
 
 @Book{Rauch83,