Articles

Wimmer, Nordqvist & Billger. 3rd International Symposium on Block and Sublevel Caving (pp. 625-637). Santiago, Chile: Universidad de Chile. Jan 1, 2014

Articles

Coring Magazine, August 2023

"The importance of instrument calibration: Scale factor error – Part 2"

Coring Magazine, May 2023

"The importance of instrument calibration - Part 1"

Coring Magazine, January 2022

“A technical note on dogleg severity”

Coring Magazine, March 2021

"Technical interview with Dag Billger and Duncan McLeod"

Africa Outlook Magazine, Nr 90 2020

"Trevali company profile"

Bergsmannen, Nr 3 2020

"TwinGyro mäter rätt i komplicerade borrhål"

Borrsvängen, Nr 3 2020

"Mikrogyro sparar tid och ger mer data"

Coring Magazine, April 2020

"Comparing multishot & continuous surveys using the TwinGyro"

Coring Magazine, February 2019

"Similarities between magnetic and north-finding survey tools"

Coring Magazine, March 2021

"Methodology for up-hole drilling accuracymeasurements at Kiruna SLC mine"

"Methodology for up-hole drilling accuracy
measurements at Kiruna SLC mine"