There have been two one-year studies on SC (COMB and MOTS), several case studies, and two tests on monitoring bone strontium intake.

Combination of Micronutrients for Bone (COMB) Study

https://www.hindawi.com/journals/jeph/2012/354151/

Melatonin-micronutrients Osteopenia Treatment Study (MOTS)

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5310667/

BMD increases by Varying Amounts with Strontium Citrate and Decreases by Varying Amounts after Discontinuation (three case studies)

http://strontiumforbones.blogspot.com/2018/02/bmd-increases-by-varying-amounts-with.html

In Memory of Sara Shackleford DeHart (links to her three case studies)

http://strontiumforbones.blogspot.com/2018/01/in-memory-of-sara-shackleford-dehart.html

Monitoring bone strontium intake in osteoporotic females self-supplementing with strontium citrate  with a novel in-vivo X-ray fluorescence based diagnostic tool

http://strontiumforbones.blogspot.com/2014/10/monitoring-bone-st...

Monitoring bone strontium levels of an osteoporotic subject due to self-administration of strontium citrate with a novel diagnostic tool, in-vivo XRF: a case study

http://strontiumforbones.blogspot.com/2014/10/monitoring-bone-st...