Virkki, Niilo <br/><br/>
Non- Conjugation and Late Conjugation of the Sex Chromosomes in the Beetles of the Genus Alagoasa Chrysomelidae; Alticinae 

 - Helsinki :   Suomalainen Tiedeakatemia,   1961. 
 - 22 p. :   il. ;   18 cm. 
 - Annales Academiae Scientiarum Fennicae. Serie A. IV. Biológica ;   54 .