diff --git a/topics/Activity_based_models.md b/topics/Activity_based_models.md
index e49c1082c2..adc2a59f2f 100644
--- a/topics/Activity_based_models.md
+++ b/topics/Activity_based_models.md
@@ -37,7 +37,7 @@ Three theoretical approaches are distinguished in the construction of activity b
 
 ### Constraint-based models
 
-This is the first generation of activity based models. The main goal of these models is to examine whether an individual \[activity agenda\] is feasible within particular space-time constraints. Examples include [PESASP (Lenntorp, 1976)](PESASP_Lenntorp_1976)), CARLA (Jones et al. 1983), BSP (Huigen, 1986), MAGIC (Dijst, 1995; Dijst and Vidakovic, 1997), and GISICAS (Kwan, 1997). There are some [limitations in classic constraint based approaches](Limitations_in_classic_constraint_based_approaches.html).
+This is the first generation of activity based models. The main goal of these models is to examine whether an individual \[activity agenda\] is feasible within particular space-time constraints. Examples include [PESASP (Lenntorp, 1976)](http://www.worldcat.org/oclc/3063593)), CARLA (Jones et al. 1983), BSP (Huigen, 1986), MAGIC (Dijst, 1995; Dijst and Vidakovic, 1997), and GISICAS (Kwan, 1997). There are some [limitations in classic constraint based approaches](Limitations_in_classic_constraint_based_approaches.html).
 
 ### Utility-maximizing models
 
@@ -63,4 +63,3 @@ Future Prospects
 ----------------
 
 There are still several issues remaining in the current designs and implementations of activity based models that need further attention and discussion. [Future prospect for activity-based models](Future_prospect_for_activity_based_models) on one hand increase the complexity of these models and increase the necessity to do formal uncertainty analysis. On the other hand, these future prospects for these activity based models may help promote and establish the activity based model as a more integrated, interdependent framework.
-
diff --git a/topics/PESASP_Lenntorp_1976_.md b/topics/PESASP_Lenntorp_1976_.md
deleted file mode 100644
index c72b48fc25..0000000000
--- a/topics/PESASP_Lenntorp_1976_.md
+++ /dev/null
@@ -1,38 +0,0 @@
----
-title: "PESASP (Lenntorp, 1976)"
-noTOC: true
-categories:
-  - Needs Review
-  - Papers
-  - Resources
-links:
-  - type: Book 
-    label: "Link"
-    url: http://www.worldcat.org/title/paths-in-space-time-environments-a-timegeographic-study-of-movement-possibilities-of-individuals/oclc/003063593
----
-
-
-''Paths in space-time environments : a timegeographic study of movement possibilities of individuals"
-
-#### Author
-
-Bo Lenntorp
-
-#### Source
-
-\[Lund\] : Royal University of Lund, Dept. of Geography, 1976.
-
-#### Abstract
-
-Lenntorp's PESASP (Program Evaluating the Set of Alternative Sample Paths) model is noteworthy becasue it represents the first attempt to operationalize the theoretical framework advanced by Hagerstrand in a manner that would allow meaningful policy evaluation.
-
-#### Copyright & Usage Permissions
-
-#### Publication Date
-
-1976}}
-
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-
-
-
diff --git a/topics/TF_Resource_Volunteers.md b/topics/TF_Resource_Volunteers.md
index 388be607e1..1bca74cb51 100644
--- a/topics/TF_Resource_Volunteers.md
+++ b/topics/TF_Resource_Volunteers.md
@@ -305,7 +305,7 @@ Below is a list of all pages that belong to this wiki. If the link to the page i
 | NCHRP Synthesis 364]| Greg|Greg | Deleted|
 | [Online Travel Survey Manual](Online_Travel_Survey_Manual) | Greg | Greg | Updated Links to DOI|
 | [Open Code Directory](Open_Code_Directory) | Greg |Greg | |
-| [PESASP (Lenntorp, 1976)](PESASP_(Lenntorp,_1976)) | | | |
+| [PESASP (Lenntorp, 1976)](PESASP_(Lenntorp,_1976)) | Greg |Greg | Deleted|
 | [Papers](Papers) | | | |
 | [Peer Review - Southern California Association of Governments (SCAG) - Meeting 1](Peer_Review_Southern_California_Association_of_Governments_(SCAG)_Meeting_1) | | | |
 | [Presentations](Presentations) | | | |