Edit to point to quality papers

This is to add a reference to review the quality papers for how to create low quality samples, and if that is unsuccessful, to ask the vendor (instead of asking first).

I have also added a reference related to vascular state of the art.

This will close #339 and close #341

Supporting Documents/BS_SD.adoc

@@ -517,7 +517,8 @@ The following test steps require the developer to provide access to a test platf
 +
 . The evaluator may examine feedback messages shown (e.g. “Finger too wet” in case of fingerprint verification) to understand how the evaluator can present a biometric characteristic that does not meet the <<MBE assessment criteria for samples, assessment criteria for samples>>
 
-. The evaluator may ask the developer how low quality samples can be created if the TOE doesn’t show any feedback messages
+. The evaluator shall review public papers on biometric quality (see <<Related Documents>> for some referenced quality papers) for the appropriate modality to determine how to create low quality samples if the TOE doesn't show any feedback messages
+.. The evaluator may ask the developer for assistance if public methods are unsuccessful in creating the low quality samples
 
 . The evaluator shall present biometric samples of acceptable quality for biometric verification that satisfy the assessment criteria described in <<MBV assessment criteria for samples, assessment criteria for samples>>
 . The evaluator shall check the TOE internal data (e.g. quality scores and quality threshold) to confirm that the TOE rejects any samples that do not meet the assessment criteria specified in the <<MBV assessment criteria for samples, assessment criteria for samples>>
@@ -1673,3 +1674,4 @@ Example of warnings is that the AGD guidance may warn that the biometric verific
 - [#ISO30107-3]#[ISO/IEC 30107-3]# Biometric presentation attack detection — Part 3: Testing and reporting, First edition.        
 - [#BEAT]#[BEAT]# Biometrics Evaluation and Testing, https://www.beat-eu.org.
 - [#Biometric quality]#[Biometric quality]# Biometric quality: a review of fingerprint, iris, and face - July 2, 2014, https://link.springer.com/article/10.1186/1687-5281-2014-34.
+- [#Vascular quality]#[Vascular quality]# State of the Art in Vascular Biometrics (1.6 Presentation Attacks and Detection, and Sample Quality) - November 14, 2019, https://link.springer.com/chapter/10.1007/978-3-030-27731-4_1#Sec21.