Book  (2013)  Page(s) 29.  
 
Victor Lens se lance dans l'hybridation de rosiers et crée plusieurs variétés remarquables comme 'Ville de Malines', 'Cardinal Mercier', 'Madame Louis Lens', 'Climbing Gloria Mundi' ou 'Président van Oost'

Book  (Apr 1993)  Page(s) 468.  
 
Président Van Oost Hybrid Tea, golden yellow, edged deeper, 1934, 'Souv. de Claudius Pernet' x 'Ville de Paris'; Lens...

Book  (1944)  Page(s) 71.  
 
Terry Honeybun. Victoria
President van Oost: Deserves to be better known as it has fine shaped, pure yellow flowers that come in ample quantity. Growth and health are good.

Book  (1938)  Page(s) 108.  
 
John Poulsen, NZ.  Roses in the South Island.
President Van Oost.  Fair growth; inclined to die back; good open colour, but fades too quickly.

Book  (1937)  
 
p76.  Harry H. Hazlewood.  Some Better Roses 1930-1936
President Van Oost: Often like a yellow Rev. F. Page Roberts, but colour is most variable.

p118.  Mr. S. R. Bird.  Some Auckland Rose Notes.
What little I have seen of President Van Oost made me keen to see more of the variety. The rich canary yellow was the clearest tint imaginable, and the beautiful spiral form left nothing to be desired. 

p127.   Mr. C. Heers, Q’ld. Novelties in Queensland.
President Van Oost. A really good yellow, fine shape and appears to be a good grower.

Book  (1936)  
 
p33.  Harry H. Hazlewood.  The New Roses of 1936. 
President Van Cost (Lens) is somewhat like a pale 'Rev. F. Page Roberts', but showing more pink in the autumn flowering. It will be a welcome addition if it does not die back.

p114.  Mr. Allen A. Brundrett.  The New Roses in Victoria. 
President Van Oost, H.T. (Lens). Colour, fairly deep golden yellow, 25 to 30 petals. The buds are very nicely shaped. This
variety, being hardy and vigorous, promises to be a good general purpose Rose and well worth further trial.

Website/Catalog  (1936)  Page(s) 42.  
 
New Roses 1936.  President van Oost (HT. L. Lens  1934) Orange yellow bud opening to a large, double, golden yellow flower, carried on long strong stems. Vigorous, very free flowering and luxurious foliage.  4/- each. 
Some blooms have been like 'Rev. F. Page Roberts', with 25 to 30 petals. Very variable.

Book  (1936)  Page(s) 526.  
 
van Oost, Président (HT) Lens 1934; Sv. Cl. Pernet X Ville de Paris; golden-yellow, edges darker, large, double, solitary or up to 3, very floriferous, Long strong stems, buds orange, growth 6/10. Sangerhausen