Index: doc/bibliography/pl.bib
===================================================================
--- doc/bibliography/pl.bib	(revision f22d100510cee85fc1b8cc48eaa4e589a2fd5192)
+++ doc/bibliography/pl.bib	(revision ad47ec4378fa0d341e9ffb6e548e5ef3ef6c6bcc)
@@ -2231,4 +2231,17 @@
 }
 
+@article{Cargill91,
+    keywords	= {C++, multiple inheritance, implementation},
+    contributer	= {pabuhr},
+    author	= {Tom A. Cargill},
+    title	= {Controversy: The Case Against Multiple Inheritance in {C}{\kern-.1em\hbox{\large\texttt{+\kern-.25em+}}}},
+    journal	= {Computer Systems},
+    number	= 1,
+    volume	= 4,
+    month	= {Winter},
+    year	= 1991,
+    pages	= {69-82},
+}
+
 @unpublished{Ditchfield:conversions,
     contributer	= {a3moss@uwaterloo.ca},
@@ -3610,5 +3623,5 @@
     number	= 1,
     month	= jan,
-    year	= {1987},
+    year	= 1987,
     pages	= {1-11},
     publisher	= {ACM},
@@ -5205,15 +5218,12 @@
     author	= {Hesselink, Wim H. and Buhr, Peter A.},
     title	= {MCSH, a Lock with the Standard Interface},
-    issue_date	= {June 2023},
+    journal	= {ACM Trans. Parallel Comput.},
     publisher	= {ACM},
     address	= {New York, NY, USA},
     volume	= 10,
     number	= 2,
-    journal	= {ACM Trans. Parallel Comput.},
-    issn	= {2329-4949},
-    articleno	= 11,
-    numpages	= 23,
+    year	= 2023,
     month	= jun,
-    year	= {2023},
+    pages	= {1-23},
 }
 
@@ -5605,4 +5615,17 @@
     month	= may,
     year	= 1987,
+}
+
+@article{Stroustrup89,
+    keywords	= {C++, multiple inheritance, implementation},
+    contributer	= {pabuhr},
+    author	= {Bjarne Stroustrup},
+    title	= {Multiple Inheritance for {C}{\kern-.1em\hbox{\large\texttt{+\kern-.25em+}}}},
+    journal	= {Computer Systems},
+    number	= 4,
+    volume	= 2,
+    month	= {Fall},
+    year	= 1989,
+    pages	= {367-395},
 }
 
@@ -5787,5 +5810,5 @@
 
 @inproceedings{Thompson90new,
-    keywords	= {Plan 9},
+    keywords	= {Plan-9, unnamed substructures},
     contributer	= {pabuhr@plg},
     title	= {A New {C} Compiler},
@@ -5794,5 +5817,5 @@
     year	= 1990,
     pages	= {41-51},
-    note	= {\url{http://doc.cat-v.org/bell_labs/new_c_compilers/new_c_compiler.pdf}},
+    note	= {\url{https://doc.cat-v.org/bell_labs/new_c_compilers/new_c_compiler.pdf}},
 }