- Primary Lateral Sclerosis
Elaine MacNeill. ALS Society of Canada /Société canadienne de la SLA. n.d. Canada. - About PLS (Primary Lateral Sclerosis)
John K. Fink, M.D.. Spastic Paraplegia Foundation. USA. - Amyotrophic Lateral Sclerosis (ALS) and Other Motor Neuron Diseases (MNDs)
Michael Rubin. Merck Manuel /Le Manuel Merck. 2020. USA. - Primary Lateral Sclerosis (PLS)
Mayo Clinic. 2019. USA. - Primary Lateral Sclerosis Information Page
National Institue of Neurological Disorders and Stroke. 2019. USA. - Spastic Paraplegia Foundation, Inc.
USA.